240121420 has 96 divisors (see below), whose sum is σ = 644184576. Its totient is φ = 72998400.

The previous prime is 240121391. The next prime is 240121433. The reversal of 240121420 is 24121042.

It is a junction number, because it is equal to n+sod(n) for n = 240121394 and 240121403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61239 + ... + 65041.

It is an arithmetic number, because the mean of its divisors is an integer number (6710256).

Almost surely, 2^240121420 is an apocalyptic number.

240121420 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 240121420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322092288).

240121420 is an abundant number, since it is smaller than the sum of its proper divisors (404063156).

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

240121420 is a wasteful number, since it uses less digits than its factorization.

240121420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871 (or 3869 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 240121420 is about 15495.8517029559. The cubic root of 240121420 is about 621.5512835698.

Adding to 240121420 its reverse (24121042), we get a palindrome (264242462).

The spelling of 240121420 in words is "two hundred forty million, one hundred twenty-one thousand, four hundred twenty".