1252988365642 has 32 divisors (see below), whose sum is σ = 2026201217040. Its totient is φ = 577690337280.

The previous prime is 1252988365639. The next prime is 1252988365649. The reversal of 1252988365642 is 2465638892521.

It can be written as a sum of positive squares in 8 ways, for example, as 845662320801 + 407326044841 = 919599^2 + 638221^2 .

It is not an unprimeable number, because it can be changed into a prime (1252988365649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159795642 + ... + 159803482.

Almost surely, 2^{1252988365642} is an apocalyptic number.

1252988365642 is a deficient number, since it is larger than the sum of its proper divisors (773212851398).

1252988365642 is a wasteful number, since it uses less digits than its factorization.

1252988365642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13578.

The product of its digits is 49766400, while the sum is 61.

The spelling of 1252988365642 in words is "one trillion, two hundred fifty-two billion, nine hundred eighty-eight million, three hundred sixty-five thousand, six hundred forty-two".