3960581 has 2 divisors, whose sum is σ = 3960582. Its totient is φ = 3960580.

The previous prime is 3960557. The next prime is 3960587. The reversal of 3960581 is 1850693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3648100 + 312481 = 1910^2 + 559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3960581 is a prime.

It is a super-2 number, since 2×3960581² = 31372403715122, 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 (3960587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1980290 + 1980291.

It is an arithmetic number, because the mean of its divisors is an integer number (1980291).

Almost surely, 2^3960581 is an apocalyptic number.

It is an amenable number.

3960581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3960581 is an equidigital number, since it uses as much as digits as its factorization.

3960581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 3960581 is about 1990.1208506018. The cubic root of 3960581 is about 158.2169348263.

The spelling of 3960581 in words is "three million, nine hundred sixty thousand, five hundred eighty-one".