1252686985225 has 81 divisors (see below), whose sum is σ = 1714159347327. Its totient is φ = 907708538880.

The previous prime is 1252686985219. The next prime is 1252686985267. The reversal of 1252686985225 is 5225896862521.

The square root of 1252686985225 is 1119235.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 467676809161 + 785010176064 = 683869^2 + 886008^2 .

It is not a de Polignac number, because 1252686985225 - 2³⁷ = 1115248031753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 4874268297 + ... + 4874268553.

Almost surely, 2^{1252686985225} is an apocalyptic number.

1252686985225 is the 1119235-th square number.

1252686985225 is the 559618-th centered octagonal number.

It is an amenable number.

1252686985225 is a deficient number, since it is larger than the sum of its proper divisors (461472362102).

1252686985225 is an frugal number, since it uses more digits than its factorization.

1252686985225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 342 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 61.

The spelling of 1252686985225 in words is "one trillion, two hundred fifty-two billion, six hundred eighty-six million, nine hundred eighty-five thousand, two hundred twenty-five".