11491851 has 16 divisors (see below), whose sum is σ = 17800448. Its totient is φ = 6458400.

The previous prime is 11491841. The next prime is 11491853. The reversal of 11491851 is 15819411.

It is a happy number.

It is not a de Polignac number, because 11491851 - 2⁶ = 11491787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11491853) 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 15 ways as a sum of consecutive naturals, for example, 3205 + ... + 5766.

It is an arithmetic number, because the mean of its divisors is an integer number (1112528).

Almost surely, 2^11491851 is an apocalyptic number.

11491851 is a deficient number, since it is larger than the sum of its proper divisors (6308597).

11491851 is an equidigital number, since it uses as much as digits as its factorization.

11491851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9042.

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

The square root of 11491851 is about 3389.9632741373. The cubic root of 11491851 is about 225.6645439600.

The spelling of 11491851 in words is "eleven million, four hundred ninety-one thousand, eight hundred fifty-one".