13242638 has 8 divisors (see below), whose sum is σ = 20136288. Its totient is φ = 6530544.

The previous prime is 13242637. The next prime is 13242661. The reversal of 13242638 is 83624231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13242638² = 350734922398088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13242638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13242637) 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, 45206 + ... + 45497.

It is an arithmetic number, because the mean of its divisors is an integer number (2517036).

Almost surely, 2^13242638 is an apocalyptic number.

13242638 is a deficient number, since it is larger than the sum of its proper divisors (6893650).

13242638 is an equidigital number, since it uses as much as digits as its factorization.

13242638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90778.

The product of its digits is 6912, while the sum is 29.

The square root of 13242638 is about 3639.0435556613. The cubic root of 13242638 is about 236.5873405594.

Adding to 13242638 its reverse (83624231), we get a palindrome (96866869).

The spelling of 13242638 in words is "thirteen million, two hundred forty-two thousand, six hundred thirty-eight".