252402521 has 8 divisors (see below), whose sum is σ = 288689280. Its totient is φ = 216173088.

The previous prime is 252402511. The next prime is 252402523. The reversal of 252402521 is 125204252.

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 252402521 - 2¹⁰ = 252401497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252402523) 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, 4436 + ... + 22901.

It is an arithmetic number, because the mean of its divisors is an integer number (36086160).

Almost surely, 2^252402521 is an apocalyptic number.

It is an amenable number.

252402521 is a deficient number, since it is larger than the sum of its proper divisors (36286759).

252402521 is a wasteful number, since it uses less digits than its factorization.

252402521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28663.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 252402521 is about 15887.1810274825. The cubic root of 252402521 is about 631.9720860728.

Adding to 252402521 its reverse (125204252), we get a palindrome (377606773).

The spelling of 252402521 in words is "two hundred fifty-two million, four hundred two thousand, five hundred twenty-one".