11173421 has 12 divisors (see below), whose sum is σ = 13302432. Its totient is φ = 9352728.

The previous prime is 11173417. The next prime is 11173427. The reversal of 11173421 is 12437111.

It is a happy number.

It is not a de Polignac number, because 11173421 - 2² = 11173417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11173393 and 11173402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11173427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 545 + ... + 4758.

It is an arithmetic number, because the mean of its divisors is an integer number (1108536).

Almost surely, 2^11173421 is an apocalyptic number.

It is an amenable number.

11173421 is a deficient number, since it is larger than the sum of its proper divisors (2129011).

11173421 is an equidigital number, since it uses as much as digits as its factorization.

11173421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360 (or 5353 counting only the distinct ones).

The product of its digits is 168, while the sum is 20.

The square root of 11173421 is about 3342.6667497673. Note that the first 3 decimals coincide. The cubic root of 11173421 is about 223.5606623151.

The spelling of 11173421 in words is "eleven million, one hundred seventy-three thousand, four hundred twenty-one".