261260994 has 32 divisors (see below), whose sum is σ = 540794880. Its totient is φ = 84056400.

The previous prime is 261260969. The next prime is 261261019. The reversal of 261260994 is 499062162.

It is an interprime number because it is at equal distance from previous prime (261260969) and next prime (261261019).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 78537 + ... + 81795.

It is an arithmetic number, because the mean of its divisors is an integer number (16899840).

Almost surely, 2^261260994 is an apocalyptic number.

261260994 is an abundant number, since it is smaller than the sum of its proper divisors (279533886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261260994 is a wasteful number, since it uses less digits than its factorization.

261260994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3726.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 261260994 is about 16163.5699645839. The cubic root of 261260994 is about 639.2805995290.

The spelling of 261260994 in words is "two hundred sixty-one million, two hundred sixty thousand, nine hundred ninety-four".