261025394 has 64 divisors (see below), whose sum is σ = 481738752. Its totient is φ = 103723200.

The previous prime is 261025339. The next prime is 261025409. The reversal of 261025394 is 493520162.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 261025394.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1324904 + ... + 1325100.

It is an arithmetic number, because the mean of its divisors is an integer number (7527168).

Almost surely, 2^261025394 is an apocalyptic number.

261025394 is a deficient number, since it is larger than the sum of its proper divisors (220713358).

261025394 is a wasteful number, since it uses less digits than its factorization.

261025394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 261025394 is about 16156.2803268574. The cubic root of 261025394 is about 639.0883782010.

The spelling of 261025394 in words is "two hundred sixty-one million, twenty-five thousand, three hundred ninety-four".