261020572 has 12 divisors (see below), whose sum is σ = 457228800. Its totient is φ = 130383776.

The previous prime is 261020569. The next prime is 261020581. The reversal of 261020572 is 275020162.

261020572 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 26908 + ... + 35299.

It is an arithmetic number, because the mean of its divisors is an integer number (38102400).

Almost surely, 2^261020572 is an apocalyptic number.

It is an amenable number.

261020572 is a deficient number, since it is larger than the sum of its proper divisors (196208228).

261020572 is a wasteful number, since it uses less digits than its factorization.

261020572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63260 (or 63258 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 261020572 is about 16156.1310962743. The cubic root of 261020572 is about 639.0844428200.

The spelling of 261020572 in words is "two hundred sixty-one million, twenty thousand, five hundred seventy-two".