3974139 has 12 divisors (see below), whose sum is σ = 6182176. Its totient is φ = 2445552.

The previous prime is 3974129. The next prime is 3974143. The reversal of 3974139 is 9314793.

It is not a de Polignac number, because 3974139 - 2¹¹ = 3972091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3974129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16867 + ... + 17100.

Almost surely, 2^3974139 is an apocalyptic number.

3974139 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

3974139 is a deficient number, since it is larger than the sum of its proper divisors (2208037).

3974139 is a wasteful number, since it uses less digits than its factorization.

3974139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33986 (or 33983 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 3974139 is about 1993.5242662180. The cubic root of 3974139 is about 158.3972671322.

Adding to 3974139 its product of digits (20412), we get a triangular number (3994551 = T₂₈₂₆).

The spelling of 3974139 in words is "three million, nine hundred seventy-four thousand, one hundred thirty-nine".