3979121 has 4 divisors (see below), whose sum is σ = 3990000. Its totient is φ = 3968244.

The previous prime is 3979117. The next prime is 3979127. The reversal of 3979121 is 1219793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3979121 - 2² = 3979117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3979127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4871 + ... + 5628.

It is an arithmetic number, because the mean of its divisors is an integer number (997500).

Almost surely, 2^3979121 is an apocalyptic number.

It is an amenable number.

3979121 is a deficient number, since it is larger than the sum of its proper divisors (10879).

3979121 is a wasteful number, since it uses less digits than its factorization.

3979121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10878.

The product of its digits is 3402, while the sum is 32.

The square root of 3979121 is about 1994.7734207173. The cubic root of 3979121 is about 158.4634286882.

The spelling of 3979121 in words is "three million, nine hundred seventy-nine thousand, one hundred twenty-one".