11166421 has 16 divisors (see below), whose sum is σ = 13415040. Its totient is φ = 9092160.

The previous prime is 11166403. The next prime is 11166427. The reversal of 11166421 is 12466111.

11166421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11166421 - 2¹⁵ = 11133653 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 11166392 and 11166401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11166427) 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, 13191 + ... + 14011.

It is an arithmetic number, because the mean of its divisors is an integer number (838440).

Almost surely, 2^11166421 is an apocalyptic number.

It is an amenable number.

11166421 is a deficient number, since it is larger than the sum of its proper divisors (2248619).

11166421 is an equidigital number, since it uses as much as digits as its factorization.

11166421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its digits is 288, while the sum is 22.

The square root of 11166421 is about 3341.6195175394. The cubic root of 11166421 is about 223.5139666328.

The spelling of 11166421 in words is "eleven million, one hundred sixty-six thousand, four hundred twenty-one".