11397921 has 8 divisors (see below), whose sum is σ = 15218880. Its totient is φ = 7587792.

The previous prime is 11397913. The next prime is 11397931. The reversal of 11397921 is 12979311.

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

It is not a de Polignac number, because 11397921 - 2³ = 11397913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11397931) 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, 196 + ... + 4778.

It is an arithmetic number, because the mean of its divisors is an integer number (1902360).

Almost surely, 2^11397921 is an apocalyptic number.

It is an amenable number.

11397921 is a deficient number, since it is larger than the sum of its proper divisors (3820959).

11397921 is an equidigital number, since it uses as much as digits as its factorization.

11397921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5415.

The product of its digits is 3402, while the sum is 33.

The square root of 11397921 is about 3376.0807158597. The cubic root of 11397921 is about 225.0480292530.

The spelling of 11397921 in words is "eleven million, three hundred ninety-seven thousand, nine hundred twenty-one".