39402121 has 8 divisors (see below), whose sum is σ = 43899264. Its totient is φ = 35057520.

The previous prime is 39402113. The next prime is 39402127. The reversal of 39402121 is 12120493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39402121 - 2³ = 39402113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39402092 and 39402101.

It is not an unprimeable number, because it can be changed into a prime (39402127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37590 + ... + 38623.

It is an arithmetic number, because the mean of its divisors is an integer number (5487408).

Almost surely, 2^39402121 is an apocalyptic number.

It is an amenable number.

39402121 is a deficient number, since it is larger than the sum of its proper divisors (4497143).

39402121 is a wasteful number, since it uses less digits than its factorization.

39402121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76271.

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

The square root of 39402121 is about 6277.1108800148. The cubic root of 39402121 is about 340.2826974084.

The spelling of 39402121 in words is "thirty-nine million, four hundred two thousand, one hundred twenty-one".