1251376385 has 16 divisors (see below), whose sum is σ = 1806499200. Its totient is φ = 812923776.

The previous prime is 1251376381. The next prime is 1251376397. The reversal of 1251376385 is 5836731521.

It is not a de Polignac number, because 1251376385 - 2² = 1251376381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251376381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 940220 + ... + 941549.

It is an arithmetic number, because the mean of its divisors is an integer number (112906200).

Almost surely, 2^1251376385 is an apocalyptic number.

It is an amenable number.

1251376385 is a deficient number, since it is larger than the sum of its proper divisors (555122815).

1251376385 is a wasteful number, since it uses less digits than its factorization.

1251376385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881800.

The product of its digits is 151200, while the sum is 41.

The square root of 1251376385 is about 35374.7987273426. The cubic root of 1251376385 is about 1077.6125775323.

The spelling of 1251376385 in words is "one billion, two hundred fifty-one million, three hundred seventy-six thousand, three hundred eighty-five".