7319521 has 8 divisors (see below), whose sum is σ = 8082144. Its totient is φ = 6573120.

The previous prime is 7319509. The next prime is 7319531. The reversal of 7319521 is 1259137.

It is the 1105-th star number.

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

It is a cyclic number.

It is not a de Polignac number, because 7319521 - 2⁷ = 7319393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7319521.

It is not an unprimeable number, because it can be changed into a prime (7319531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3096 + ... + 4921.

It is an arithmetic number, because the mean of its divisors is an integer number (1010268).

Almost surely, 2^7319521 is an apocalyptic number.

It is an amenable number.

7319521 is a deficient number, since it is larger than the sum of its proper divisors (762623).

7319521 is a wasteful number, since it uses less digits than its factorization.

7319521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8111.

The product of its digits is 1890, while the sum is 28.

The square root of 7319521 is about 2705.4613284983. The cubic root of 7319521 is about 194.1605023821.

The spelling of 7319521 in words is "seven million, three hundred nineteen thousand, five hundred twenty-one".