261059956 has 24 divisors (see below), whose sum is σ = 495532296. Its totient is φ = 119854080.

The previous prime is 261059933. The next prime is 261059963. The reversal of 261059956 is 659950162.

It can be written as a sum of positive squares in 4 ways, for example, as 95062500 + 165997456 = 9750^2 + 12884^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44031 + ... + 49606.

It is an arithmetic number, because the mean of its divisors is an integer number (20647179).

Almost surely, 2^261059956 is an apocalyptic number.

It is an amenable number.

261059956 is a deficient number, since it is larger than the sum of its proper divisors (234472340).

261059956 is a wasteful number, since it uses less digits than its factorization.

261059956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93699 (or 93697 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 261059956 is about 16157.3499064667. The cubic root of 261059956 is about 639.1165838829.

The spelling of 261059956 in words is "two hundred sixty-one million, fifty-nine thousand, nine hundred fifty-six".