1257131079 has 24 divisors (see below), whose sum is σ = 2006271072. Its totient is φ = 754490880.

The previous prime is 1257131059. The next prime is 1257131087. The reversal of 1257131079 is 9701317521.

1257131079 is a `hidden beast` number, since 1 + 2 + 571 + 3 + 10 + 79 = 666.

1257131079 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1257131079 - 2¹¹ = 1257129031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257131039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175102 + ... + 182139.

It is an arithmetic number, because the mean of its divisors is an integer number (83594628).

Almost surely, 2^1257131079 is an apocalyptic number.

1257131079 is a deficient number, since it is larger than the sum of its proper divisors (749139993).

1257131079 is a wasteful number, since it uses less digits than its factorization.

1257131079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357287 (or 357284 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The square root of 1257131079 is about 35456.0443225129. The cubic root of 1257131079 is about 1079.2619211186.

The spelling of 1257131079 in words is "one billion, two hundred fifty-seven million, one hundred thirty-one thousand, seventy-nine".