1257851255 has 16 divisors (see below), whose sum is σ = 1576005120. Its totient is φ = 961945248.

The previous prime is 1257851237. The next prime is 1257851261. The reversal of 1257851255 is 5521587521.

It is a cyclic number.

It is not a de Polignac number, because 1257851255 - 2¹⁶ = 1257785719 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, 345374 + ... + 348996.

It is an arithmetic number, because the mean of its divisors is an integer number (98500320).

Almost surely, 2^1257851255 is an apocalyptic number.

1257851255 is a deficient number, since it is larger than the sum of its proper divisors (318153865).

1257851255 is a wasteful number, since it uses less digits than its factorization.

1257851255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670.

The product of its digits is 140000, while the sum is 41.

The square root of 1257851255 is about 35466.1987672770. The cubic root of 1257851255 is about 1079.4679749847.

The spelling of 1257851255 in words is "one billion, two hundred fifty-seven million, eight hundred fifty-one thousand, two hundred fifty-five".