3899121 has 8 divisors (see below), whose sum is σ = 5424960. Its totient is φ = 2486352.

The previous prime is 3899117. The next prime is 3899131. The reversal of 3899121 is 1219983.

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

It is not a de Polignac number, because 3899121 - 2² = 3899117 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

3899121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3899101) 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, 28186 + ... + 28323.

It is an arithmetic number, because the mean of its divisors is an integer number (678120).

Almost surely, 2^3899121 is an apocalyptic number.

It is an amenable number.

3899121 is a deficient number, since it is larger than the sum of its proper divisors (1525839).

3899121 is a wasteful number, since it uses less digits than its factorization.

3899121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56535.

The product of its digits is 3888, while the sum is 33.

The square root of 3899121 is about 1974.6192037960. The cubic root of 3899121 is about 157.3942651375.

The spelling of 3899121 in words is "three million, eight hundred ninety-nine thousand, one hundred twenty-one".