13427581 has 2 divisors, whose sum is σ = 13427582. Its totient is φ = 13427580.

The previous prime is 13427573. The next prime is 13427593. The reversal of 13427581 is 18572431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10023556 + 3404025 = 3166^2 + 1845^2 .

It is a cyclic number.

It is not a de Polignac number, because 13427581 - 2³ = 13427573 is a prime.

It is a super-2 number, since 2×13427581² = 360599863023122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13427081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6713790 + 6713791.

It is an arithmetic number, because the mean of its divisors is an integer number (6713791).

Almost surely, 2^13427581 is an apocalyptic number.

It is an amenable number.

13427581 is a deficient number, since it is larger than the sum of its proper divisors (1).

13427581 is an equidigital number, since it uses as much as digits as its factorization.

13427581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 13427581 is about 3664.3663845200. The cubic root of 13427581 is about 237.6836238297.

It can be divided in two parts, 13427 and 581, that multiplied together give a palindrome (7801087).

The spelling of 13427581 in words is "thirteen million, four hundred twenty-seven thousand, five hundred eighty-one".