38642121 has 12 divisors (see below), whose sum is σ = 63790272. Its totient is φ = 22081176.

The previous prime is 38642113. The next prime is 38642137. The reversal of 38642121 is 12124683.

38642121 is a `hidden beast` number, since 3 + 8 + 642 + 12 + 1 = 666.

It is not a de Polignac number, because 38642121 - 2³ = 38642113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38642101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306621 + ... + 306746.

It is an arithmetic number, because the mean of its divisors is an integer number (5315856).

Almost surely, 2^38642121 is an apocalyptic number.

It is an amenable number.

38642121 is a deficient number, since it is larger than the sum of its proper divisors (25148151).

38642121 is a wasteful number, since it uses less digits than its factorization.

38642121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613380 (or 613377 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 38642121 is about 6216.2787099679. The cubic root of 38642121 is about 338.0806531152.

The spelling of 38642121 in words is "thirty-eight million, six hundred forty-two thousand, one hundred twenty-one".