11125891 has 16 divisors (see below), whose sum is σ = 13120000. Its totient is φ = 9430344.

The previous prime is 11125853. The next prime is 11125909. The reversal of 11125891 is 19852111.

It is not a de Polignac number, because 11125891 - 2⁹ = 11125379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11125841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55810 + ... + 56008.

It is an arithmetic number, because the mean of its divisors is an integer number (820000).

Almost surely, 2^11125891 is an apocalyptic number.

11125891 is a deficient number, since it is larger than the sum of its proper divisors (1994109).

11125891 is an equidigital number, since it uses as much as digits as its factorization.

11125891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 369 counting only the distinct ones).

The product of its digits is 720, while the sum is 28.

The square root of 11125891 is about 3335.5495799043. The cubic root of 11125891 is about 223.2432143023.

The spelling of 11125891 in words is "eleven million, one hundred twenty-five thousand, eight hundred ninety-one".