1255112613 has 6 divisors (see below), whose sum is σ = 1812940454. Its totient is φ = 836741736.

The previous prime is 1255112609. The next prime is 1255112647. The reversal of 1255112613 is 3162115521.

1255112613 is a `hidden beast` number, since 125 + 511 + 26 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1016780769 + 238331844 = 31887^2 + 15438^2 .

It is not a de Polignac number, because 1255112613 - 2² = 1255112609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255112693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69728470 + ... + 69728487.

Almost surely, 2^1255112613 is an apocalyptic number.

It is an amenable number.

1255112613 is a deficient number, since it is larger than the sum of its proper divisors (557827841).

1255112613 is a wasteful number, since it uses less digits than its factorization.

1255112613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139456963 (or 139456960 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1255112613 is about 35427.5685448494. The cubic root of 1255112613 is about 1078.6839860387.

The spelling of 1255112613 in words is "one billion, two hundred fifty-five million, one hundred twelve thousand, six hundred thirteen".