13671157 has 4 divisors (see below), whose sum is σ = 13678560. Its totient is φ = 13663756.

The previous prime is 13671143. The next prime is 13671173. The reversal of 13671157 is 75117631.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75117631 = 1723 ⋅43597.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13671157 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 (13671257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608 + ... + 5470.

It is an arithmetic number, because the mean of its divisors is an integer number (3419640).

Almost surely, 2^13671157 is an apocalyptic number.

It is an amenable number.

13671157 is a deficient number, since it is larger than the sum of its proper divisors (7403).

13671157 is an equidigital number, since it uses as much as digits as its factorization.

13671157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7402.

The product of its digits is 4410, while the sum is 31.

The square root of 13671157 is about 3697.4527718417. The cubic root of 13671157 is about 239.1122119155.

Adding to 13671157 its reverse (75117631), we get a palindrome (88788788).

The spelling of 13671157 in words is "thirteen million, six hundred seventy-one thousand, one hundred fifty-seven".