13362581 has 4 divisors (see below), whose sum is σ = 13793664. Its totient is φ = 12931500.

The previous prime is 13362553. The next prime is 13362593. The reversal of 13362581 is 18526331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18526331 = 29 ⋅638839.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13362581 is a prime.

It is a super-2 number, since 2×13362581² = 357117141963122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13362511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215495 + ... + 215556.

It is an arithmetic number, because the mean of its divisors is an integer number (3448416).

Almost surely, 2^13362581 is an apocalyptic number.

It is an amenable number.

13362581 is a deficient number, since it is larger than the sum of its proper divisors (431083).

13362581 is an equidigital number, since it uses as much as digits as its factorization.

13362581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431082.

The product of its digits is 4320, while the sum is 29.

The square root of 13362581 is about 3655.4864245405. The cubic root of 13362581 is about 237.2994783924.

The spelling of 13362581 in words is "thirteen million, three hundred sixty-two thousand, five hundred eighty-one".