1253425522521 has 16 divisors (see below), whose sum is σ = 1682670124800. Its totient is φ = 829900433280.

The previous prime is 1253425522507. The next prime is 1253425522523. The reversal of 1253425522521 is 1252255243521.

It is not a de Polignac number, because 1253425522521 - 2²¹ = 1253423425369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1253425522521.

It is not an unprimeable number, because it can be changed into a prime (1253425522523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3317661 + ... + 3676101.

It is an arithmetic number, because the mean of its divisors is an integer number (105166882800).

Almost surely, 2^{1253425522521} is an apocalyptic number.

It is an amenable number.

1253425522521 is a deficient number, since it is larger than the sum of its proper divisors (429244602279).

1253425522521 is a wasteful number, since it uses less digits than its factorization.

1253425522521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366416.

The product of its digits is 240000, while the sum is 39.

The spelling of 1253425522521 in words is "one trillion, two hundred fifty-three billion, four hundred twenty-five million, five hundred twenty-two thousand, five hundred twenty-one".