7983521 has 24 divisors (see below), whose sum is σ = 10188864. Its totient is φ = 6199200.

The previous prime is 7983517. The next prime is 7983529. The reversal of 7983521 is 1253897.

It is not a de Polignac number, because 7983521 - 2² = 7983517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7983529) 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, 52796 + ... + 52946.

It is an arithmetic number, because the mean of its divisors is an integer number (424536).

Almost surely, 2^7983521 is an apocalyptic number.

It is an amenable number.

7983521 is a deficient number, since it is larger than the sum of its proper divisors (2205343).

7983521 is a wasteful number, since it uses less digits than its factorization.

7983521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 254 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 7983521 is about 2825.5125198802. The cubic root of 7983521 is about 199.8625806012.

The spelling of 7983521 in words is "seven million, nine hundred eighty-three thousand, five hundred twenty-one".