7941581 has 2 divisors, whose sum is σ = 7941582. Its totient is φ = 7941580.

The previous prime is 7941547. The next prime is 7941599. The reversal of 7941581 is 1851497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6584356 + 1357225 = 2566^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 7941581 - 2⁶ = 7941517 is a prime.

It is a super-2 number, since 2×7941581² = 126137417559122, 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 (7941281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970790 + 3970791.

It is an arithmetic number, because the mean of its divisors is an integer number (3970791).

Almost surely, 2^7941581 is an apocalyptic number.

It is an amenable number.

7941581 is a deficient number, since it is larger than the sum of its proper divisors (1).

7941581 is an equidigital number, since it uses as much as digits as its factorization.

7941581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 35.

The square root of 7941581 is about 2818.0810847099. The cubic root of 7941581 is about 199.5119851762.

The spelling of 7941581 in words is "seven million, nine hundred forty-one thousand, five hundred eighty-one".