1257107051 has 12 divisors (see below), whose sum is σ = 1372514400. Its totient is φ = 1149866928.

The previous prime is 1257107039. The next prime is 1257107081. The reversal of 1257107051 is 1507017521.

It is not a de Polignac number, because 1257107051 - 2²² = 1252912747 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (1257107011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49571 + ... + 70508.

It is an arithmetic number, because the mean of its divisors is an integer number (114376200).

Almost surely, 2^1257107051 is an apocalyptic number.

1257107051 is a deficient number, since it is larger than the sum of its proper divisors (115407349).

1257107051 is a wasteful number, since it uses less digits than its factorization.

1257107051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120146 (or 120127 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 29.

The square root of 1257107051 is about 35455.7054788083. The cubic root of 1257107051 is about 1079.2550449673.

The spelling of 1257107051 in words is "one billion, two hundred fifty-seven million, one hundred seven thousand, fifty-one".