3991124 has 12 divisors (see below), whose sum is σ = 7395444. Its totient is φ = 1878144.

The previous prime is 3991111. The next prime is 3991139. The reversal of 3991124 is 4211993.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2502724 + 1488400 = 1582^2 + 1220^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29279 + ... + 29414.

It is an arithmetic number, because the mean of its divisors is an integer number (616287).

Almost surely, 2^3991124 is an apocalyptic number.

3991124 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

3991124 is a deficient number, since it is larger than the sum of its proper divisors (3404320).

3991124 is a wasteful number, since it uses less digits than its factorization.

3991124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58714 (or 58712 counting only the distinct ones).

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

The square root of 3991124 is about 1997.7797676421. The cubic root of 3991124 is about 158.6226034773.

The spelling of 3991124 in words is "three million, nine hundred ninety-one thousand, one hundred twenty-four".