1251376264 has 16 divisors (see below), whose sum is σ = 2369563020. Its totient is φ = 619492800.

The previous prime is 1251376241. The next prime is 1251376267. The reversal of 1251376264 is 4626731521.

It can be written as a sum of positive squares in 2 ways, for example, as 1250188164 + 1188100 = 35358^2 + 1090^2 .

It is not an unprimeable number, because it can be changed into a prime (1251376267) 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, 773559 + ... + 775174.

Almost surely, 2^1251376264 is an apocalyptic number.

It is an amenable number.

1251376264 is a deficient number, since it is larger than the sum of its proper divisors (1118186756).

1251376264 is a wasteful number, since it uses less digits than its factorization.

1251376264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548840 (or 1548836 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 1251376264 is about 35374.7970170855. The cubic root of 1251376264 is about 1077.6125427996.

The spelling of 1251376264 in words is "one billion, two hundred fifty-one million, three hundred seventy-six thousand, two hundred sixty-four".