40392121 has 24 divisors (see below), whose sum is σ = 51726816. Its totient is φ = 31187520.

The previous prime is 40392097. The next prime is 40392127. The reversal of 40392121 is 12129304.

40392121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40392121 - 2⁷ = 40391993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40392092 and 40392101.

It is not an unprimeable number, because it can be changed into a prime (40392127) 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, 73570 + ... + 74116.

It is an arithmetic number, because the mean of its divisors is an integer number (2155284).

Almost surely, 2^40392121 is an apocalyptic number.

It is an amenable number.

40392121 is a deficient number, since it is larger than the sum of its proper divisors (11334695).

40392121 is a wasteful number, since it uses less digits than its factorization.

40392121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 40392121 is about 6355.4796042470. The cubic root of 40392121 is about 343.1090865023.

The spelling of 40392121 in words is "forty million, three hundred ninety-two thousand, one hundred twenty-one".