1257861496 has 16 divisors (see below), whose sum is σ = 2358923400. Its totient is φ = 628815264.

The previous prime is 1257861469. The next prime is 1257861497. The reversal of 1257861496 is 6941687521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257861497) by changing a digit.

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, 47470 + ... + 69058.

Almost surely, 2^1257861496 is an apocalyptic number.

It is an amenable number.

1257861496 is a deficient number, since it is larger than the sum of its proper divisors (1101061904).

1257861496 is a wasteful number, since it uses less digits than its factorization.

1257861496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28878 (or 28874 counting only the distinct ones).

The product of its digits is 725760, while the sum is 49.

The square root of 1257861496 is about 35466.3431438878. The cubic root of 1257861496 is about 1079.4709045313.

The spelling of 1257861496 in words is "one billion, two hundred fifty-seven million, eight hundred sixty-one thousand, four hundred ninety-six".