840092121 has 16 divisors (see below), whose sum is σ = 1357725120. Its totient is φ = 509146560.

The previous prime is 840092107. The next prime is 840092129. The reversal of 840092121 is 121290048.

It is not a de Polignac number, because 840092121 - 2²² = 835897817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (840092129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1414000 + ... + 1414593.

It is an arithmetic number, because the mean of its divisors is an integer number (84857820).

Almost surely, 2^840092121 is an apocalyptic number.

It is an amenable number.

840092121 is a deficient number, since it is larger than the sum of its proper divisors (517632999).

840092121 is a wasteful number, since it uses less digits than its factorization.

840092121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828613 (or 2828607 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 840092121 is about 28984.3426870440. The cubic root of 840092121 is about 943.5732867618.

The spelling of 840092121 in words is "eight hundred forty million, ninety-two thousand, one hundred twenty-one".