261426976 has 24 divisors (see below), whose sum is σ = 515134620. Its totient is φ = 130599168.

The previous prime is 261426959. The next prime is 261426983. The reversal of 261426976 is 679624162.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 249008400 + 12418576 = 15780^2 + 3524^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42870 + ... + 48586.

Almost surely, 2^261426976 is an apocalyptic number.

It is an amenable number.

261426976 is a deficient number, since it is larger than the sum of its proper divisors (253707644).

261426976 is a wasteful number, since it uses less digits than its factorization.

261426976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7156 (or 7148 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 261426976 is about 16168.7035967637. The cubic root of 261426976 is about 639.4159515487.

The spelling of 261426976 in words is "two hundred sixty-one million, four hundred twenty-six thousand, nine hundred seventy-six".