11251139 has 4 divisors (see below), whose sum is σ = 11326800. Its totient is φ = 11175480.

The previous prime is 11251133. The next prime is 11251147. The reversal of 11251139 is 93115211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11251139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11251133) 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, 37607 + ... + 37904.

It is an arithmetic number, because the mean of its divisors is an integer number (2831700).

Almost surely, 2^11251139 is an apocalyptic number.

11251139 is a deficient number, since it is larger than the sum of its proper divisors (75661).

11251139 is an equidigital number, since it uses as much as digits as its factorization.

11251139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75660.

The product of its digits is 270, while the sum is 23.

The square root of 11251139 is about 3354.2717540474. The cubic root of 11251139 is about 224.0777990282.

The spelling of 11251139 in words is "eleven million, two hundred fifty-one thousand, one hundred thirty-nine".