13621157 has 8 divisors (see below), whose sum is σ = 15641760. Its totient is φ = 11730960.

The previous prime is 13621151. The next prime is 13621187. The reversal of 13621157 is 75112631.

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 13621157 - 2¹⁰ = 13620133 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 (13621151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32378 + ... + 32795.

It is an arithmetic number, because the mean of its divisors is an integer number (1955220).

Almost surely, 2^13621157 is an apocalyptic number.

It is an amenable number.

13621157 is a deficient number, since it is larger than the sum of its proper divisors (2020603).

13621157 is a wasteful number, since it uses less digits than its factorization.

13621157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65203.

The product of its digits is 1260, while the sum is 26.

The square root of 13621157 is about 3690.6851667407. The cubic root of 13621157 is about 238.8203513337.

Adding to 13621157 its reverse (75112631), we get a palindrome (88733788).

The spelling of 13621157 in words is "thirteen million, six hundred twenty-one thousand, one hundred fifty-seven".