1251026745172 has 24 divisors (see below), whose sum is σ = 2201653974240. Its totient is φ = 621989552160.

The previous prime is 1251026745169. The next prime is 1251026745193. The reversal of 1251026745172 is 2715476201521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113047 + ... + 1585822.

It is an arithmetic number, because the mean of its divisors is an integer number (91735582260).

Almost surely, 2^{1251026745172} is an apocalyptic number.

It is an amenable number.

1251026745172 is a deficient number, since it is larger than the sum of its proper divisors (950627229068).

1251026745172 is a wasteful number, since it uses less digits than its factorization.

1251026745172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699911 (or 1699909 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 1251026745172 in words is "one trillion, two hundred fifty-one billion, twenty-six million, seven hundred forty-five thousand, one hundred seventy-two".