1251143875957 has 4 divisors (see below), whose sum is σ = 1251230492736. Its totient is φ = 1251057259180.

The previous prime is 1251143875921. The next prime is 1251143875963. The reversal of 1251143875957 is 7595783411521.

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 a de Polignac number, because none of the positive numbers 2^k-1251143875957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251143875967) 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, 43286719 + ... + 43315612.

It is an arithmetic number, because the mean of its divisors is an integer number (312807623184).

Almost surely, 2^{1251143875957} is an apocalyptic number.

It is an amenable number.

1251143875957 is a deficient number, since it is larger than the sum of its proper divisors (86616779).

1251143875957 is an equidigital number, since it uses as much as digits as its factorization.

1251143875957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86616778.

The product of its digits is 10584000, while the sum is 58.

The spelling of 1251143875957 in words is "one trillion, two hundred fifty-one billion, one hundred forty-three million, eight hundred seventy-five thousand, nine hundred fifty-seven".