1257122764 has 12 divisors (see below), whose sum is σ = 2315752600. Its totient is φ = 595479168.

The previous prime is 1257122747. The next prime is 1257122803. The reversal of 1257122764 is 4672217521.

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 3 ways as a sum of consecutive naturals, for example, 8270469 + ... + 8270620.

Almost surely, 2^1257122764 is an apocalyptic number.

It is an amenable number.

1257122764 is a deficient number, since it is larger than the sum of its proper divisors (1058629836).

1257122764 is a wasteful number, since it uses less digits than its factorization.

1257122764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16541112 (or 16541110 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

The square root of 1257122764 is about 35455.9270644557. The cubic root of 1257122764 is about 1079.2595416047.

The spelling of 1257122764 in words is "one billion, two hundred fifty-seven million, one hundred twenty-two thousand, seven hundred sixty-four".