1257155404 has 6 divisors (see below), whose sum is σ = 2200021964. Its totient is φ = 628577700.

The previous prime is 1257155399. The next prime is 1257155441. The reversal of 1257155404 is 4045517521.

It is a self number, because there is not a number n which added to its sum of digits gives 1257155404.

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 as a sum of consecutive naturals, namely, 157144422 + ... + 157144429.

Almost surely, 2^1257155404 is an apocalyptic number.

It is an amenable number.

1257155404 is a deficient number, since it is larger than the sum of its proper divisors (942866560).

1257155404 is a wasteful number, since it uses less digits than its factorization.

1257155404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314288855 (or 314288853 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 1257155404 is about 35456.3873512235. The cubic root of 1257155404 is about 1079.2688821739.

The spelling of 1257155404 in words is "one billion, two hundred fifty-seven million, one hundred fifty-five thousand, four hundred four".