1255479771 has 64 divisors (see below), whose sum is σ = 2177925120. Its totient is φ = 625173120.

The previous prime is 1255479763. The next prime is 1255479773. The reversal of 1255479771 is 1779745521.

It is not a de Polignac number, because 1255479771 - 2³ = 1255479763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255479771.

It is not an unprimeable number, because it can be changed into a prime (1255479773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 494776 + ... + 497306.

It is an arithmetic number, because the mean of its divisors is an integer number (34030080).

Almost surely, 2^1255479771 is an apocalyptic number.

1255479771 is a deficient number, since it is larger than the sum of its proper divisors (922445349).

1255479771 is a wasteful number, since it uses less digits than its factorization.

1255479771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656.

The product of its digits is 617400, while the sum is 48.

The square root of 1255479771 is about 35432.7499779512. The cubic root of 1255479771 is about 1078.7891582330.

The spelling of 1255479771 in words is "one billion, two hundred fifty-five million, four hundred seventy-nine thousand, seven hundred seventy-one".