252107521 has 4 divisors (see below), whose sum is σ = 253238272. Its totient is φ = 250976772.

The previous prime is 252107519. The next prime is 252107543. The reversal of 252107521 is 125701252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252107521 - 2¹ = 252107519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252107551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565041 + ... + 565486.

It is an arithmetic number, because the mean of its divisors is an integer number (63309568).

Almost surely, 2^252107521 is an apocalyptic number.

It is an amenable number.

252107521 is a deficient number, since it is larger than the sum of its proper divisors (1130751).

252107521 is a wasteful number, since it uses less digits than its factorization.

252107521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130750.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 252107521 is about 15877.8940983998. The cubic root of 252107521 is about 631.7257804976.

Adding to 252107521 its reverse (125701252), we get a palindrome (377808773).

The spelling of 252107521 in words is "two hundred fifty-two million, one hundred seven thousand, five hundred twenty-one".