5129581 has 2 divisors, whose sum is σ = 5129582. Its totient is φ = 5129580.

The previous prime is 5129557. The next prime is 5129617. The reversal of 5129581 is 1859215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5062500 + 67081 = 2250^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 5129581 - 2¹¹ = 5127533 is a prime.

It is a super-2 number, since 2×5129581² = 52625202471122, 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 (5129081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564790 + 2564791.

It is an arithmetic number, because the mean of its divisors is an integer number (2564791).

Almost surely, 2^5129581 is an apocalyptic number.

It is an amenable number.

5129581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5129581 is an equidigital number, since it uses as much as digits as its factorization.

5129581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 31.

The square root of 5129581 is about 2264.8578321829. The cubic root of 5129581 is about 172.4622167476.

The spelling of 5129581 in words is "five million, one hundred twenty-nine thousand, five hundred eighty-one".