1161256532 has 24 divisors (see below), whose sum is σ = 2048797800. Its totient is φ = 575897600.

The previous prime is 1161256531. The next prime is 1161256567. The reversal of 1161256532 is 2356521611.

It can be written as a sum of positive squares in 4 ways, for example, as 227587396 + 933669136 = 15086^2 + 30556^2 .

It is a super-2 number, since 2×1161256532² = 2697033466225334048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161256531) 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, 724532 + ... + 726132.

It is an arithmetic number, because the mean of its divisors is an integer number (85366575).

Almost surely, 2^1161256532 is an apocalyptic number.

It is an amenable number.

1161256532 is a deficient number, since it is larger than the sum of its proper divisors (887541268).

1161256532 is a wasteful number, since it uses less digits than its factorization.

1161256532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971 (or 2969 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 1161256532 is about 34077.2142640797. The cubic root of 1161256532 is about 1051.0968227263.

The spelling of 1161256532 in words is "one billion, one hundred sixty-one million, two hundred fifty-six thousand, five hundred thirty-two".