13004157 has 4 divisors (see below), whose sum is σ = 17338880. Its totient is φ = 8669436.

The previous prime is 13004143. The next prime is 13004161. The reversal of 13004157 is 75140031.

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 not a de Polignac number, because 13004157 - 2¹¹ = 13002109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13004137) 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, 2167357 + ... + 2167362.

It is an arithmetic number, because the mean of its divisors is an integer number (4334720).

Almost surely, 2^13004157 is an apocalyptic number.

It is an amenable number.

13004157 is a deficient number, since it is larger than the sum of its proper divisors (4334723).

13004157 is an equidigital number, since it uses as much as digits as its factorization.

13004157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334722.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 13004157 is about 3606.1277015658. The cubic root of 13004157 is about 235.1585289173.

Adding to 13004157 its reverse (75140031), we get a palindrome (88144188).

The spelling of 13004157 in words is "thirteen million, four thousand, one hundred fifty-seven".