5961581 has 2 divisors, whose sum is σ = 5961582. Its totient is φ = 5961580.

The previous prime is 5961569. The next prime is 5961583. The reversal of 5961581 is 1851695.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4182025 + 1779556 = 2045^2 + 1334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5961581 is a prime.

It is a super-2 number, since 2×5961581² = 71080896039122, which contains 22 as substring.

Together with 5961583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5961583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2980790 + 2980791.

It is an arithmetic number, because the mean of its divisors is an integer number (2980791).

Almost surely, 2^5961581 is an apocalyptic number.

It is an amenable number.

5961581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5961581 is an equidigital number, since it uses as much as digits as its factorization.

5961581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 35.

The square root of 5961581 is about 2441.6349030926. The cubic root of 5961581 is about 181.3233843151.

The spelling of 5961581 in words is "five million, nine hundred sixty-one thousand, five hundred eighty-one".