3974981 has 2 divisors, whose sum is σ = 3974982. Its totient is φ = 3974980.

The previous prime is 3974969. The next prime is 3974987. The reversal of 3974981 is 1894793.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2992900 + 982081 = 1730^2 + 991^2 .

It is an emirp because it is prime and its reverse (1894793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3974981 - 2⁶ = 3974917 is a prime.

It is a super-2 number, since 2×3974981² = 31600947900722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3974987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1987490 + 1987491.

It is an arithmetic number, because the mean of its divisors is an integer number (1987491).

Almost surely, 2^3974981 is an apocalyptic number.

It is an amenable number.

3974981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3974981 is an equidigital number, since it uses as much as digits as its factorization.

3974981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 3974981 is about 1993.7354388183. The cubic root of 3974981 is about 158.4084528743.

The spelling of 3974981 in words is "three million, nine hundred seventy-four thousand, nine hundred eighty-one".