840092561 has 24 divisors (see below), whose sum is σ = 1084833984. Its totient is φ = 631995840.

The previous prime is 840092531. The next prime is 840092567. The reversal of 840092561 is 165290048.

It is not a de Polignac number, because 840092561 - 2⁶ = 840092497 is a prime.

It is a super-2 number, since 2×840092561² = 1411511022095077442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840092567) 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 23 ways as a sum of consecutive naturals, for example, 58271 + ... + 71243.

It is an arithmetic number, because the mean of its divisors is an integer number (45201416).

Almost surely, 2^840092561 is an apocalyptic number.

It is an amenable number.

840092561 is a deficient number, since it is larger than the sum of its proper divisors (244741423).

840092561 is a wasteful number, since it uses less digits than its factorization.

840092561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13049 (or 13020 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 840092561 is about 28984.3502773479. The cubic root of 840092561 is about 943.5734514946.

The spelling of 840092561 in words is "eight hundred forty million, ninety-two thousand, five hundred sixty-one".