97521 has 4 divisors (see below), whose sum is σ = 130032. Its totient is φ = 65012.

The previous prime is 97511. The next prime is 97523. The reversal of 97521 is 12579.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97521 - 2¹⁰ = 96497 is a prime.

It is a D-number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 97491 and 97500.

It is not an unprimeable number, because it can be changed into a prime (97523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16251 + ... + 16256.

It is an arithmetic number, because the mean of its divisors is an integer number (32508).

2⁹⁷⁵²¹ is an apocalyptic number.

It is an amenable number.

97521 is a deficient number, since it is larger than the sum of its proper divisors (32511).

97521 is a wasteful number, since it uses less digits than its factorization.

97521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32510.

The product of its digits is 630, while the sum is 24.

The square root of 97521 is about 312.2835250217. The cubic root of 97521 is about 46.0291245932.

The spelling of 97521 in words is "ninety-seven thousand, five hundred twenty-one".