13242257 has 8 divisors (see below), whose sum is σ = 15167232. Its totient is φ = 11325600.

The previous prime is 13242253. The next prime is 13242277. The reversal of 13242257 is 75224231.

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

It is a cyclic number.

It is not a de Polignac number, because 13242257 - 2² = 13242253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13242253) 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 7 ways as a sum of consecutive naturals, for example, 1832 + ... + 5462.

It is an arithmetic number, because the mean of its divisors is an integer number (1895904).

Almost surely, 2^13242257 is an apocalyptic number.

It is an amenable number.

13242257 is a deficient number, since it is larger than the sum of its proper divisors (1924975).

13242257 is an equidigital number, since it uses as much as digits as its factorization.

13242257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159.

The product of its digits is 3360, while the sum is 26.

The square root of 13242257 is about 3638.9912063648. The cubic root of 13242257 is about 236.5850716096.

Adding to 13242257 its reverse (75224231), we get a palindrome (88466488).

The spelling of 13242257 in words is "thirteen million, two hundred forty-two thousand, two hundred fifty-seven".