13861857 has 8 divisors (see below), whose sum is σ = 18652480. Its totient is φ = 9156240.

The previous prime is 13861853. The next prime is 13861877. The reversal of 13861857 is 75816831.

13861857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13861857 - 2² = 13861853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13861853) 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, 20869 + ... + 21522.

It is an arithmetic number, because the mean of its divisors is an integer number (2331560).

Almost surely, 2^13861857 is an apocalyptic number.

It is an amenable number.

13861857 is a deficient number, since it is larger than the sum of its proper divisors (4790623).

13861857 is a wasteful number, since it uses less digits than its factorization.

13861857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42503.

The product of its digits is 40320, while the sum is 39.

The square root of 13861857 is about 3723.1514876513. The cubic root of 13861857 is about 240.2188801815.

The spelling of 13861857 in words is "thirteen million, eight hundred sixty-one thousand, eight hundred fifty-seven".