261570982 has 8 divisors (see below), whose sum is σ = 402960816. Its totient is φ = 127250712.

The previous prime is 261570977. The next prime is 261570997. The reversal of 261570982 is 289075162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 1767298 + ... + 1767445.

It is an arithmetic number, because the mean of its divisors is an integer number (50370102).

Almost surely, 2^261570982 is an apocalyptic number.

261570982 is a deficient number, since it is larger than the sum of its proper divisors (141389834).

261570982 is a wasteful number, since it uses less digits than its factorization.

261570982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534782.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 261570982 is about 16173.1562163976. The cubic root of 261570982 is about 639.5333365675.

The spelling of 261570982 in words is "two hundred sixty-one million, five hundred seventy thousand, nine hundred eighty-two".