521234120 has 48 divisors (see below), whose sum is σ = 1289097180. Its totient is φ = 189537920.

The previous prime is 521234113. The next prime is 521234123. The reversal of 521234120 is 21432125.

It can be written as a sum of positive squares in 2 ways, for example, as 510488836 + 10745284 = 22594^2 + 3278^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 521234092 and 521234101.

It is not an unprimeable number, because it can be changed into a prime (521234123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49007 + ... + 58686.

Almost surely, 2^521234120 is an apocalyptic number.

It is an amenable number.

521234120 is an abundant number, since it is smaller than the sum of its proper divisors (767863060).

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

521234120 is a wasteful number, since it uses less digits than its factorization.

521234120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107726 (or 107711 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 521234120 is about 22830.5523367263. The cubic root of 521234120 is about 804.7808104029.

Adding to 521234120 its reverse (21432125), we get a palindrome (542666245).

The spelling of 521234120 in words is "five hundred twenty-one million, two hundred thirty-four thousand, one hundred twenty".