252120521 has 8 divisors (see below), whose sum is σ = 261542400. Its totient is φ = 242854560.

The previous prime is 252120499. The next prime is 252120581. The reversal of 252120521 is 125021252.

It is a happy number.

252120521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252120521 - 2¹⁸ = 251858377 is a prime.

It is a super-2 number, since 2×252120521² = 127129514218622882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 252120493 and 252120502.

It is not an unprimeable number, because it can be changed into a prime (252120581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35681 + ... + 42158.

It is an arithmetic number, because the mean of its divisors is an integer number (32692800).

Almost surely, 2^252120521 is an apocalyptic number.

It is an amenable number.

252120521 is a deficient number, since it is larger than the sum of its proper divisors (9421879).

252120521 is an equidigital number, since it uses as much as digits as its factorization.

252120521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77959.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 252120521 is about 15878.3034673104. The cubic root of 252120521 is about 631.7366386874.

Adding to 252120521 its reverse (125021252), we get a palindrome (377141773).

The spelling of 252120521 in words is "two hundred fifty-two million, one hundred twenty thousand, five hundred twenty-one".