261379132 has 18 divisors (see below), whose sum is σ = 532093632. Its totient is φ = 112019544.

The previous prime is 261379123. The next prime is 261379159. The reversal of 261379132 is 231973162.

261379132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666588 + ... + 666979.

Almost surely, 2^261379132 is an apocalyptic number.

It is an amenable number.

261379132 is an abundant number, since it is smaller than the sum of its proper divisors (270714500).

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

261379132 is a wasteful number, since it uses less digits than its factorization.

261379132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333585 (or 1333576 counting only the distinct ones).

The product of its digits is 13608, while the sum is 34.

The square root of 261379132 is about 16167.2240041387. The cubic root of 261379132 is about 639.3769424614.

The spelling of 261379132 in words is "two hundred sixty-one million, three hundred seventy-nine thousand, one hundred thirty-two".