13242491 has 4 divisors (see below), whose sum is σ = 13467000. Its totient is φ = 13017984.

The previous prime is 13242443. The next prime is 13242497. The reversal of 13242491 is 19424231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19424231 = 2621 ⋅7411.

It is a cyclic number.

It is not a de Polignac number, because 13242491 - 2¹⁴ = 13226107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13242491.

It is not an unprimeable number, because it can be changed into a prime (13242497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112166 + ... + 112283.

It is an arithmetic number, because the mean of its divisors is an integer number (3366750).

Almost surely, 2^13242491 is an apocalyptic number.

13242491 is a deficient number, since it is larger than the sum of its proper divisors (224509).

13242491 is an equidigital number, since it uses as much as digits as its factorization.

13242491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224508.

The product of its digits is 1728, while the sum is 26.

The square root of 13242491 is about 3639.0233579904. The cubic root of 13242491 is about 236.5864651429.

The spelling of 13242491 in words is "thirteen million, two hundred forty-two thousand, four hundred ninety-one".