261280652 has 12 divisors (see below), whose sum is σ = 458361960. Its totient is φ = 130320096.

The previous prime is 261280631. The next prime is 261280693. The reversal of 261280652 is 256082162.

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, 78218 + ... + 81489.

It is an arithmetic number, because the mean of its divisors is an integer number (38196830).

Almost surely, 2^261280652 is an apocalyptic number.

It is an amenable number.

261280652 is a deficient number, since it is larger than the sum of its proper divisors (197081308).

261280652 is a wasteful number, since it uses less digits than its factorization.

261280652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160120 (or 160118 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 261280652 is about 16164.1780490070. The cubic root of 261280652 is about 639.2966328738.

The spelling of 261280652 in words is "two hundred sixty-one million, two hundred eighty thousand, six hundred fifty-two".