1257611255 has 16 divisors (see below), whose sum is σ = 1584230400. Its totient is φ = 957125280.

The previous prime is 1257611233. The next prime is 1257611263. The reversal of 1257611255 is 5521167521.

It is not a de Polignac number, because 1257611255 - 2²⁰ = 1256562679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59615 + ... + 77904.

It is an arithmetic number, because the mean of its divisors is an integer number (99014400).

Almost surely, 2^1257611255 is an apocalyptic number.

1257611255 is a deficient number, since it is larger than the sum of its proper divisors (326619145).

1257611255 is a wasteful number, since it uses less digits than its factorization.

1257611255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137614.

The product of its digits is 21000, while the sum is 35.

The square root of 1257611255 is about 35462.8151025832. The cubic root of 1257611255 is about 1079.3993158880.

Adding to 1257611255 its reverse (5521167521), we get a palindrome (6778778776).

The spelling of 1257611255 in words is "one billion, two hundred fifty-seven million, six hundred eleven thousand, two hundred fifty-five".