261296276 has 12 divisors (see below), whose sum is σ = 457416960. Its totient is φ = 130605720.

The previous prime is 261296267. The next prime is 261296279. The reversal of 261296276 is 672692162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261296279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6221 + ... + 23691.

It is an arithmetic number, because the mean of its divisors is an integer number (38118080).

Almost surely, 2^261296276 is an apocalyptic number.

It is an amenable number.

261296276 is a deficient number, since it is larger than the sum of its proper divisors (196120684).

261296276 is a wasteful number, since it uses less digits than its factorization.

261296276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21214 (or 21212 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 261296276 is about 16164.6613326726. The cubic root of 261296276 is about 639.3093754572.

The spelling of 261296276 in words is "two hundred sixty-one million, two hundred ninety-six thousand, two hundred seventy-six".