11242891 has 8 divisors (see below), whose sum is σ = 12318768. Its totient is φ = 10176000.

The previous prime is 11242877. The next prime is 11242901. The reversal of 11242891 is 19824211.

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

It is a 9-Lehmer number, since φ(11242891) divides (11242891-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 11242891 - 2⁵ = 11242859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11240891) 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 7 ways as a sum of consecutive naturals, for example, 531 + ... + 4771.

It is an arithmetic number, because the mean of its divisors is an integer number (1539846).

Almost surely, 2^11242891 is an apocalyptic number.

11242891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11242891 is a deficient number, since it is larger than the sum of its proper divisors (1075877).

11242891 is a wasteful number, since it uses less digits than its factorization.

11242891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4493.

The product of its digits is 1152, while the sum is 28.

The square root of 11242891 is about 3353.0420516301. The cubic root of 11242891 is about 224.0230298919.

The spelling of 11242891 in words is "eleven million, two hundred forty-two thousand, eight hundred ninety-one".