9737521 has 4 divisors (see below), whose sum is σ = 9747700. Its totient is φ = 9727344.

The previous prime is 9737509. The next prime is 9737561. The reversal of 9737521 is 1257379.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1257379 = 239 ⋅5261.

It can be written as a sum of positive squares in 2 ways, for example, as 2640625 + 7096896 = 1625^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 9737521 - 2¹⁷ = 9606449 is a prime.

It is the 3121-st Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9737501) by changing a digit.

It is a nontrivial repunit in base 3120.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3486 + ... + 5623.

It is an arithmetic number, because the mean of its divisors is an integer number (2436925).

Almost surely, 2^9737521 is an apocalyptic number.

It is an amenable number.

9737521 is a deficient number, since it is larger than the sum of its proper divisors (10179).

9737521 is a wasteful number, since it uses less digits than its factorization.

9737521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10178.

The product of its digits is 13230, while the sum is 34.

The square root of 9737521 is about 3120.5001201730. The cubic root of 9737521 is about 213.5417524246.

The spelling of 9737521 in words is "nine million, seven hundred thirty-seven thousand, five hundred twenty-one".