1251326375642 has 16 divisors (see below), whose sum is σ = 2145194613312. Its totient is φ = 536266811520.

The previous prime is 1251326375587. The next prime is 1251326375693. The reversal of 1251326375642 is 2465736231521.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831959 + ... + 1787402.

It is an arithmetic number, because the mean of its divisors is an integer number (134074663332).

Almost surely, 2^{1251326375642} is an apocalyptic number.

1251326375642 is a deficient number, since it is larger than the sum of its proper divisors (893868237670).

1251326375642 is a wasteful number, since it uses less digits than its factorization.

1251326375642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653493.

The product of its digits is 1814400, while the sum is 47.

The spelling of 1251326375642 in words is "one trillion, two hundred fifty-one billion, three hundred twenty-six million, three hundred seventy-five thousand, six hundred forty-two".