261393572 has 12 divisors (see below), whose sum is σ = 499024176. Its totient is φ = 118815240.

The previous prime is 261393571. The next prime is 261393611. The reversal of 261393572 is 275393162.

261393572 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (261393571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2970338 + ... + 2970425.

It is an arithmetic number, because the mean of its divisors is an integer number (41585348).

Almost surely, 2^261393572 is an apocalyptic number.

261393572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261393572 is a deficient number, since it is larger than the sum of its proper divisors (237630604).

261393572 is a wasteful number, since it uses less digits than its factorization.

261393572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940778 (or 5940776 counting only the distinct ones).

The product of its digits is 68040, while the sum is 38.

The square root of 261393572 is about 16167.6705805134. The cubic root of 261393572 is about 639.3887164605.

The spelling of 261393572 in words is "two hundred sixty-one million, three hundred ninety-three thousand, five hundred seventy-two".