261047912 has 16 divisors (see below), whose sum is σ = 489658500. Its totient is φ = 130472320.

The previous prime is 261047909. The next prime is 261047929. The reversal of 261047912 is 219740162.

It is a happy number.

261047912 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 248188516 + 12859396 = 15754^2 + 3586^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22862 + ... + 32322.

Almost surely, 2^261047912 is an apocalyptic number.

It is an amenable number.

261047912 is a deficient number, since it is larger than the sum of its proper divisors (228610588).

261047912 is a wasteful number, since it uses less digits than its factorization.

261047912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12916 (or 12912 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 261047912 is about 16156.9771925320. The cubic root of 261047912 is about 639.1067551847.

The spelling of 261047912 in words is "two hundred sixty-one million, forty-seven thousand, nine hundred twelve".