7498921 has 4 divisors (see below), whose sum is σ = 7940052. Its totient is φ = 7057792.

The previous prime is 7498903. The next prime is 7498927. The reversal of 7498921 is 1298947.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5569600 + 1929321 = 2360^2 + 1389^2 .

It is a cyclic number.

It is not a de Polignac number, because 7498921 - 2²¹ = 5401769 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7498927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220540 + ... + 220573.

It is an arithmetic number, because the mean of its divisors is an integer number (1985013).

Almost surely, 2^7498921 is an apocalyptic number.

It is an amenable number.

7498921 is a deficient number, since it is larger than the sum of its proper divisors (441131).

7498921 is a wasteful number, since it uses less digits than its factorization.

7498921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441130.

The product of its digits is 36288, while the sum is 40.

The square root of 7498921 is about 2738.4157828935. The cubic root of 7498921 is about 195.7339946256.

The spelling of 7498921 in words is "seven million, four hundred ninety-eight thousand, nine hundred twenty-one".