1277255725 has 12 divisors (see below), whose sum is σ = 1626603604. Its totient is φ = 994187520.

The previous prime is 1277255699. The next prime is 1277255737. The reversal of 1277255725 is 5275527721.

It can be written as a sum of positive squares in 6 ways, for example, as 142778601 + 1134477124 = 11949^2 + 33682^2 .

It is not a de Polignac number, because 1277255725 - 2¹⁵ = 1277222957 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 689484 + ... + 691333.

Almost surely, 2^1277255725 is an apocalyptic number.

It is an amenable number.

1277255725 is a deficient number, since it is larger than the sum of its proper divisors (349347879).

1277255725 is a wasteful number, since it uses less digits than its factorization.

1277255725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380864 (or 1380859 counting only the distinct ones).

The product of its digits is 343000, while the sum is 43.

The square root of 1277255725 is about 35738.7146523207. The cubic root of 1277255725 is about 1084.9905426487.

The spelling of 1277255725 in words is "one billion, two hundred seventy-seven million, two hundred fifty-five thousand, seven hundred twenty-five".