1255275791 has 8 divisors (see below), whose sum is σ = 1565019264. Its totient is φ = 978136920.

The previous prime is 1255275757. The next prime is 1255275851. The reversal of 1255275791 is 1975725521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1255275791 - 2¹⁴ = 1255259407 is a prime.

It is a super-2 number, since 2×1255275791² = 3151434622941351362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255275731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8151065 + ... + 8151218.

It is an arithmetic number, because the mean of its divisors is an integer number (195627408).

Almost surely, 2^1255275791 is an apocalyptic number.

1255275791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1255275791 is a deficient number, since it is larger than the sum of its proper divisors (309743473).

1255275791 is a wasteful number, since it uses less digits than its factorization.

1255275791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16302301.

The product of its digits is 220500, while the sum is 44.

The square root of 1255275791 is about 35429.8714505147. The cubic root of 1255275791 is about 1078.7307308132.

The spelling of 1255275791 in words is "one billion, two hundred fifty-five million, two hundred seventy-five thousand, seven hundred ninety-one".