3949945 has 8 divisors (see below), whose sum is σ = 4903560. Its totient is φ = 3050880.

The previous prime is 3949919. The next prime is 3949961. The reversal of 3949945 is 5499493.

It can be written as a sum of positive squares in 4 ways, for example, as 1648656 + 2301289 = 1284^2 + 1517^2 .

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

It is not a de Polignac number, because 3949945 - 2⁹ = 3949433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13476 + ... + 13765.

It is an arithmetic number, because the mean of its divisors is an integer number (612945).

Almost surely, 2^3949945 is an apocalyptic number.

It is an amenable number.

3949945 is a deficient number, since it is larger than the sum of its proper divisors (953615).

3949945 is a wasteful number, since it uses less digits than its factorization.

3949945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27275.

The product of its digits is 174960, while the sum is 43.

The square root of 3949945 is about 1987.4468546354. The cubic root of 3949945 is about 158.0751791990.

The spelling of 3949945 in words is "three million, nine hundred forty-nine thousand, nine hundred forty-five".