7321491 has 6 divisors (see below), whose sum is σ = 10575500. Its totient is φ = 4880988.

The previous prime is 7321469. The next prime is 7321507. The reversal of 7321491 is 1941237.

It is not a de Polignac number, because 7321491 - 2⁹ = 7320979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7321451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 406741 + ... + 406758.

Almost surely, 2^7321491 is an apocalyptic number.

7321491 is a deficient number, since it is larger than the sum of its proper divisors (3254009).

7321491 is a wasteful number, since it uses less digits than its factorization.

7321491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813505 (or 813502 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 7321491 is about 2705.8253823926. The cubic root of 7321491 is about 194.1779198187.

The spelling of 7321491 in words is "seven million, three hundred twenty-one thousand, four hundred ninety-one".