3961139 has 32 divisors (see below), whose sum is σ = 5376000. Its totient is φ = 2830464.

The previous prime is 3961121. The next prime is 3961147. The reversal of 3961139 is 9311693.

It is not a de Polignac number, because 3961139 - 2⁸ = 3960883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3961159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50102 + ... + 50180.

It is an arithmetic number, because the mean of its divisors is an integer number (168000).

Almost surely, 2^3961139 is an apocalyptic number.

3961139 is a deficient number, since it is larger than the sum of its proper divisors (1414861).

3961139 is a wasteful number, since it uses less digits than its factorization.

3961139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147.

The product of its digits is 4374, while the sum is 32.

The square root of 3961139 is about 1990.2610381555. The cubic root of 3961139 is about 158.2243647887.

The spelling of 3961139 in words is "three million, nine hundred sixty-one thousand, one hundred thirty-nine".