3974381 has 4 divisors (see below), whose sum is σ = 4015452. Its totient is φ = 3933312.

The previous prime is 3974371. The next prime is 3974387. The reversal of 3974381 is 1834793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3118756 + 855625 = 1766^2 + 925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3974381 is a prime.

It is a super-2 number, since 2×3974381² = 31591408666322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3974387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20390 + ... + 20583.

It is an arithmetic number, because the mean of its divisors is an integer number (1003863).

Almost surely, 2^3974381 is an apocalyptic number.

It is an amenable number.

3974381 is a deficient number, since it is larger than the sum of its proper divisors (41071).

3974381 is an equidigital number, since it uses as much as digits as its factorization.

3974381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41070.

The product of its digits is 18144, while the sum is 35.

The square root of 3974381 is about 1993.5849618213. The cubic root of 3974381 is about 158.4004821985.

The spelling of 3974381 in words is "three million, nine hundred seventy-four thousand, three hundred eighty-one".