13253581 has 4 divisors (see below), whose sum is σ = 14458464. Its totient is φ = 12048700.

The previous prime is 13253579. The next prime is 13253587. The reversal of 13253581 is 18535231.

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.

It is a cyclic number.

It is not a de Polignac number, because 13253581 - 2¹ = 13253579 is a prime.

It is a super-2 number, since 2×13253581² = 351314818647122, 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 (13253587) 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, 602425 + ... + 602446.

It is an arithmetic number, because the mean of its divisors is an integer number (3614616).

Almost surely, 2^13253581 is an apocalyptic number.

13253581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13253581 is a deficient number, since it is larger than the sum of its proper divisors (1204883).

13253581 is a wasteful number, since it uses less digits than its factorization.

13253581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204882.

The product of its digits is 3600, while the sum is 28.

The square root of 13253581 is about 3640.5467995893. The cubic root of 13253581 is about 236.6524902792.

The spelling of 13253581 in words is "thirteen million, two hundred fifty-three thousand, five hundred eighty-one".