11478921 has 8 divisors (see below), whose sum is σ = 15323520. Its totient is φ = 7643472.

The previous prime is 11478913. The next prime is 11478941. The reversal of 11478921 is 12987411.

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

It is not a de Polignac number, because 11478921 - 2³ = 11478913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11478941) 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, 1575 + ... + 5043.

It is an arithmetic number, because the mean of its divisors is an integer number (1915440).

Almost surely, 2^11478921 is an apocalyptic number.

It is an amenable number.

11478921 is a deficient number, since it is larger than the sum of its proper divisors (3844599).

11478921 is a wasteful number, since it uses less digits than its factorization.

11478921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575.

The product of its digits is 4032, while the sum is 33.

The square root of 11478921 is about 3388.0556370874. The cubic root of 11478921 is about 225.5798770782.

The spelling of 11478921 in words is "eleven million, four hundred seventy-eight thousand, nine hundred twenty-one".