11154891 has 8 divisors (see below), whose sum is σ = 16225344. Its totient is φ = 6760520.

The previous prime is 11154883. The next prime is 11154917. The reversal of 11154891 is 19845111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11154891 - 2³ = 11154883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11154811) 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, 168981 + ... + 169046.

It is an arithmetic number, because the mean of its divisors is an integer number (2028168).

Almost surely, 2^11154891 is an apocalyptic number.

11154891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11154891 is a deficient number, since it is larger than the sum of its proper divisors (5070453).

11154891 is a wasteful number, since it uses less digits than its factorization.

11154891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338041.

The product of its digits is 1440, while the sum is 30.

The square root of 11154891 is about 3339.8938605890. The cubic root of 11154891 is about 223.4370096098.

It can be divided in two parts, 1115 and 4891, that added together give a palindrome (6006).

The spelling of 11154891 in words is "eleven million, one hundred fifty-four thousand, eight hundred ninety-one".