1255479975 has 36 divisors (see below), whose sum is σ = 2256764536. Its totient is φ = 667189440.

The previous prime is 1255479961. The next prime is 1255480003. The reversal of 1255479975 is 5799745521.

It is a happy number.

1255479975 is a `hidden beast` number, since 1 + 2 + 5 + 547 + 9 + 97 + 5 = 666.

It is not a de Polignac number, because 1255479975 - 2¹⁶ = 1255414439 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 53817 + ... + 73533.

Almost surely, 2^1255479975 is an apocalyptic number.

1255479975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1255479975 is a deficient number, since it is larger than the sum of its proper divisors (1001284561).

1255479975 is a wasteful number, since it uses less digits than its factorization.

1255479975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20016 (or 20008 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 54.

The square root of 1255479975 is about 35432.7528566438. The cubic root of 1255479975 is about 1078.7892166630.

It can be divided in two parts, 12554 and 79975, that added together give a palindrome (92529).

The spelling of 1255479975 in words is "one billion, two hundred fifty-five million, four hundred seventy-nine thousand, nine hundred seventy-five".