261379130 has 32 divisors (see below), whose sum is σ = 491989248. Its totient is φ = 99792000.

The previous prime is 261379123. The next prime is 261379159. The reversal of 261379130 is 31973162.

It is a happy number.

261379130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144230 + ... + 146030.

It is an arithmetic number, because the mean of its divisors is an integer number (15374664).

Almost surely, 2^261379130 is an apocalyptic number.

261379130 is a deficient number, since it is larger than the sum of its proper divisors (230610118).

261379130 is a wasteful number, since it uses less digits than its factorization.

261379130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 261379130 is about 16167.2239422852. The cubic root of 261379130 is about 639.3769408306.

The spelling of 261379130 in words is "two hundred sixty-one million, three hundred seventy-nine thousand, one hundred thirty".