7982521 has 8 divisors (see below), whose sum is σ = 8195904. Its totient is φ = 7771920.

The previous prime is 7982509. The next prime is 7982539. The reversal of 7982521 is 1252897.

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 7982521 - 2¹¹ = 7980473 is a prime.

It is a Duffinian number.

7982521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7982561) 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, 5916 + ... + 7138.

It is an arithmetic number, because the mean of its divisors is an integer number (1024488).

Almost surely, 2^7982521 is an apocalyptic number.

It is an amenable number.

7982521 is a deficient number, since it is larger than the sum of its proper divisors (213383).

7982521 is a wasteful number, since it uses less digits than its factorization.

7982521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its digits is 10080, while the sum is 34.

The square root of 7982521 is about 2825.3355552925. The cubic root of 7982521 is about 199.8542354560.

The spelling of 7982521 in words is "seven million, nine hundred eighty-two thousand, five hundred twenty-one".