11173921 has 8 divisors (see below), whose sum is σ = 12449664. Its totient is φ = 9941520.

The previous prime is 11173873. The next prime is 11173969. The reversal of 11173921 is 12937111.

It is an interprime number because it is at equal distance from previous prime (11173873) and next prime (11173969).

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 11173921 - 2¹³ = 11165729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11173021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10290 + ... + 11323.

It is an arithmetic number, because the mean of its divisors is an integer number (1556208).

Almost surely, 2^11173921 is an apocalyptic number.

11173921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11173921 is a deficient number, since it is larger than the sum of its proper divisors (1275743).

11173921 is a wasteful number, since it uses less digits than its factorization.

11173921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21671.

The product of its digits is 378, while the sum is 25.

The square root of 11173921 is about 3342.7415395151. The cubic root of 11173921 is about 223.5639969746.

The spelling of 11173921 in words is "eleven million, one hundred seventy-three thousand, nine hundred twenty-one".