241221420 has 144 divisors (see below), whose sum is σ = 825945120. Its totient is φ = 56448000.

The previous prime is 241221413. The next prime is 241221427. The reversal of 241221420 is 24122142.

241221420 is a `hidden beast` number, since 24 + 1 + 221 + 420 = 666.

It is an interprime number because it is at equal distance from previous prime (241221413) and next prime (241221427).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 241221393 and 241221402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241221427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55320 + ... + 59520.

It is an arithmetic number, because the mean of its divisors is an integer number (5735730).

Almost surely, 2^241221420 is an apocalyptic number.

241221420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 241221420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412972560).

241221420 is an abundant number, since it is smaller than the sum of its proper divisors (584723700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

241221420 is a wasteful number, since it uses less digits than its factorization.

241221420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256 (or 4251 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 241221420 is about 15531.3045170069. The cubic root of 241221420 is about 622.4989500152.

Adding to 241221420 its reverse (24122142), we get a palindrome (265343562).

It can be divided in two parts, 2412 and 21420, that added together give a palindrome (23832).

The spelling of 241221420 in words is "two hundred forty-one million, two hundred twenty-one thousand, four hundred twenty".