5478921 has 24 divisors (see below), whose sum is σ = 9382464. Its totient is φ = 3129840.

The previous prime is 5478911. The next prime is 5478937. The reversal of 5478921 is 1298745.

It is not a de Polignac number, because 5478921 - 2¹⁴ = 5462537 is a prime.

It is an alternating number because its digits alternate between odd and even.

5478921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5478911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91 + ... + 3311.

It is an arithmetic number, because the mean of its divisors is an integer number (390936).

Almost surely, 2^5478921 is an apocalyptic number.

It is an amenable number.

5478921 is a deficient number, since it is larger than the sum of its proper divisors (3903543).

5478921 is an equidigital number, since it uses as much as digits as its factorization.

5478921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243 (or 3231 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 5478921 is about 2340.7095078202. The cubic root of 5478921 is about 176.2916243926.

The spelling of 5478921 in words is "five million, four hundred seventy-eight thousand, nine hundred twenty-one".