11139857 has 4 divisors (see below), whose sum is σ = 11524020. Its totient is φ = 10755696.

The previous prime is 11139853. The next prime is 11139859. The reversal of 11139857 is 75893111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8976016 + 2163841 = 2996^2 + 1471^2 .

It is a cyclic number.

It is not a de Polignac number, because 11139857 - 2² = 11139853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11139851) 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, 192038 + ... + 192095.

It is an arithmetic number, because the mean of its divisors is an integer number (2881005).

Almost surely, 2^11139857 is an apocalyptic number.

It is an amenable number.

11139857 is a deficient number, since it is larger than the sum of its proper divisors (384163).

11139857 is an equidigital number, since it uses as much as digits as its factorization.

11139857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384162.

The product of its digits is 7560, while the sum is 35.

The square root of 11139857 is about 3337.6424314177. The cubic root of 11139857 is about 223.3365854332.

The spelling of 11139857 in words is "eleven million, one hundred thirty-nine thousand, eight hundred fifty-seven".