3930121 has 4 divisors (see below), whose sum is σ = 4232452. Its totient is φ = 3627792.

The previous prime is 3930061. The next prime is 3930139. The reversal of 3930121 is 1210393.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1795600 + 2134521 = 1340^2 + 1461^2 .

It is a cyclic number.

It is not a de Polignac number, because 3930121 - 2⁹ = 3929609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3930191) 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, 151146 + ... + 151171.

It is an arithmetic number, because the mean of its divisors is an integer number (1058113).

Almost surely, 2^3930121 is an apocalyptic number.

It is an amenable number.

3930121 is a deficient number, since it is larger than the sum of its proper divisors (302331).

3930121 is a wasteful number, since it uses less digits than its factorization.

3930121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302330.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 3930121 is about 1982.4532781380. The cubic root of 3930121 is about 157.8102861043.

The spelling of 3930121 in words is "three million, nine hundred thirty thousand, one hundred twenty-one".