1252610564521 has 4 divisors (see below), whose sum is σ = 1260111226752. Its totient is φ = 1245109902292.

The previous prime is 1252610564519. The next prime is 1252610564533. The reversal of 1252610564521 is 1254650162521.

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 1252610564521 - 2¹ = 1252610564519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252610564501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3750330865 + ... + 3750331198.

It is an arithmetic number, because the mean of its divisors is an integer number (315027806688).

Almost surely, 2^{1252610564521} is an apocalyptic number.

It is an amenable number.

1252610564521 is a deficient number, since it is larger than the sum of its proper divisors (7500662231).

1252610564521 is an equidigital number, since it uses as much as digits as its factorization.

1252610564521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7500662230.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 1252610564521 in words is "one trillion, two hundred fifty-two billion, six hundred ten million, five hundred sixty-four thousand, five hundred twenty-one".