1251412837873 has 4 divisors (see below), whose sum is σ = 1365177641328. Its totient is φ = 1137648034420.

The previous prime is 1251412837859. The next prime is 1251412837901. The reversal of 1251412837873 is 3787382141521.

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-1251412837873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251412837873.

It is not an unprimeable number, because it can be changed into a prime (1251412837853) 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, 56882401711 + ... + 56882401732.

It is an arithmetic number, because the mean of its divisors is an integer number (341294410332).

Almost surely, 2^{1251412837873} is an apocalyptic number.

It is an amenable number.

1251412837873 is a deficient number, since it is larger than the sum of its proper divisors (113764803455).

1251412837873 is a wasteful number, since it uses less digits than its factorization.

1251412837873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113764803454.

The product of its digits is 2257920, while the sum is 52.

The spelling of 1251412837873 in words is "one trillion, two hundred fifty-one billion, four hundred twelve million, eight hundred thirty-seven thousand, eight hundred seventy-three".