261304276 has 12 divisors (see below), whose sum is σ = 457406740. Its totient is φ = 130616640.

The previous prime is 261304273. The next prime is 261304279. The reversal of 261304276 is 672403162.

It is an interprime number because it is at equal distance from previous prime (261304273) and next prime (261304279).

It can be written as a sum of positive squares in 2 ways, for example, as 244296900 + 17007376 = 15630^2 + 4124^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261304273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14566 + ... + 27106.

Almost surely, 2^261304276 is an apocalyptic number.

It is an amenable number.

261304276 is a deficient number, since it is larger than the sum of its proper divisors (196102464).

261304276 is a wasteful number, since it uses less digits than its factorization.

261304276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17754 (or 17752 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 261304276 is about 16164.9087841534. The cubic root of 261304276 is about 639.3158998809.

The spelling of 261304276 in words is "two hundred sixty-one million, three hundred four thousand, two hundred seventy-six".