3949215 has 16 divisors (see below), whose sum is σ = 6594048. Its totient is φ = 2014496.

The previous prime is 3949213. The next prime is 3949217. The reversal of 3949215 is 5129493.

It is an interprime number because it is at equal distance from previous prime (3949213) and next prime (3949217).

It is a cyclic number.

It is not a de Polignac number, because 3949215 - 2¹ = 3949213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949213) 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, 5379 + ... + 6068.

It is an arithmetic number, because the mean of its divisors is an integer number (412128).

Almost surely, 2^3949215 is an apocalyptic number.

3949215 is a deficient number, since it is larger than the sum of its proper divisors (2644833).

3949215 is a wasteful number, since it uses less digits than its factorization.

3949215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11478.

The product of its digits is 9720, while the sum is 33.

The square root of 3949215 is about 1987.2631934397. The cubic root of 3949215 is about 158.0654404988.

The spelling of 3949215 in words is "three million, nine hundred forty-nine thousand, two hundred fifteen".