261206572 has 36 divisors (see below), whose sum is σ = 514738728. Its totient is φ = 115825600.

The previous prime is 261206563. The next prime is 261206587. The reversal of 261206572 is 275602162.

261206572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13263 + ... + 26425.

It is an arithmetic number, because the mean of its divisors is an integer number (14298298).

Almost surely, 2^261206572 is an apocalyptic number.

261206572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261206572 is a deficient number, since it is larger than the sum of its proper divisors (253532156).

261206572 is a wasteful number, since it uses less digits than its factorization.

261206572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13230 (or 13217 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 261206572 is about 16161.8863997988. The cubic root of 261206572 is about 639.2362079747.

The spelling of 261206572 in words is "two hundred sixty-one million, two hundred six thousand, five hundred seventy-two".