3992121 has 12 divisors (see below), whose sum is σ = 6590272. Its totient is φ = 2281176.

The previous prime is 3992099. The next prime is 3992123. The reversal of 3992121 is 1212993.

It is not a de Polignac number, because 3992121 - 2⁵ = 3992089 is a prime.

It is a Duffinian number.

3992121 is a modest number, since divided by 2121 gives 399 as remainder.

It is not an unprimeable number, because it can be changed into a prime (3992123) 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 11 ways as a sum of consecutive naturals, for example, 31621 + ... + 31746.

Almost surely, 2^3992121 is an apocalyptic number.

It is an amenable number.

3992121 is a deficient number, since it is larger than the sum of its proper divisors (2598151).

3992121 is a wasteful number, since it uses less digits than its factorization.

3992121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63380 (or 63377 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 3992121 is about 1998.0292790647. The cubic root of 3992121 is about 158.6358105813.

The spelling of 3992121 in words is "three million, nine hundred ninety-two thousand, one hundred twenty-one".