1161255256 has 32 divisors (see below), whose sum is σ = 2525552640. Its totient is φ = 490251168.

The previous prime is 1161255247. The next prime is 1161255299. The reversal of 1161255256 is 6525521611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151000 + ... + 158503.

It is an arithmetic number, because the mean of its divisors is an integer number (78923520).

Almost surely, 2^1161255256 is an apocalyptic number.

It is an amenable number.

1161255256 is an abundant number, since it is smaller than the sum of its proper divisors (1364297384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161255256 is a wasteful number, since it uses less digits than its factorization.

1161255256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309583 (or 309579 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The square root of 1161255256 is about 34077.1955418870. The cubic root of 1161255256 is about 1051.0964377410.

Adding to 1161255256 its reverse (6525521611), we get a palindrome (7686776867).

The spelling of 1161255256 in words is "one billion, one hundred sixty-one million, two hundred fifty-five thousand, two hundred fifty-six".