39804121 has 8 divisors (see below), whose sum is σ = 46419200. Its totient is φ = 34117524.

The previous prime is 39804103. The next prime is 39804131. The reversal of 39804121 is 12140893.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-39804121 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 39804121.

It is not an unprimeable number, because it can be changed into a prime (39804101) 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, 57681 + ... + 58366.

It is an arithmetic number, because the mean of its divisors is an integer number (5802400).

Almost surely, 2^39804121 is an apocalyptic number.

It is an amenable number.

39804121 is a deficient number, since it is larger than the sum of its proper divisors (6615079).

39804121 is an equidigital number, since it uses as much as digits as its factorization.

39804121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116068 (or 116054 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 39804121 is about 6309.0507209881. The cubic root of 39804121 is about 341.4360283097.

The spelling of 39804121 in words is "thirty-nine million, eight hundred four thousand, one hundred twenty-one".