3949121 has 16 divisors (see below), whose sum is σ = 4581888. Its totient is φ = 3369600.

The previous prime is 3949111. The next prime is 3949147. The reversal of 3949121 is 1219493.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3949121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3949111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12461 + ... + 12773.

It is an arithmetic number, because the mean of its divisors is an integer number (286368).

Almost surely, 2^3949121 is an apocalyptic number.

3949121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3949121 is a deficient number, since it is larger than the sum of its proper divisors (632767).

3949121 is a wasteful number, since it uses less digits than its factorization.

3949121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392.

The product of its digits is 1944, while the sum is 29.

The square root of 3949121 is about 1987.2395426823. The cubic root of 3949121 is about 158.0641863872.

The spelling of 3949121 in words is "three million, nine hundred forty-nine thousand, one hundred twenty-one".