242621020 has 48 divisors (see below), whose sum is σ = 533832768. Its totient is φ = 92449280.

The previous prime is 242621017. The next prime is 242621023. The reversal of 242621020 is 20126242.

It is an interprime number because it is at equal distance from previous prime (242621017) and next prime (242621023).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242621023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128322 + ... + 130198.

It is an arithmetic number, because the mean of its divisors is an integer number (11121516).

Almost surely, 2^242621020 is an apocalyptic number.

242621020 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 242621020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266916384).

242621020 is an abundant number, since it is smaller than the sum of its proper divisors (291211748).

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

242621020 is a wasteful number, since it uses less digits than its factorization.

242621020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190 (or 2188 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 242621020 is about 15576.2967357456. The cubic root of 242621020 is about 623.7005706457.

Adding to 242621020 its reverse (20126242), we get a palindrome (262747262).

The spelling of 242621020 in words is "two hundred forty-two million, six hundred twenty-one thousand, twenty".