9616521 has 4 divisors (see below), whose sum is σ = 12822032. Its totient is φ = 6411012.

The previous prime is 9616517. The next prime is 9616547. The reversal of 9616521 is 1256169.

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 not a de Polignac number, because 9616521 - 2² = 9616517 is a prime.

It is a super-2 number, since 2×9616521² = 184954952286882, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9616561) 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, 1602751 + ... + 1602756.

It is an arithmetic number, because the mean of its divisors is an integer number (3205508).

Almost surely, 2^9616521 is an apocalyptic number.

It is an amenable number.

9616521 is a deficient number, since it is larger than the sum of its proper divisors (3205511).

9616521 is a wasteful number, since it uses less digits than its factorization.

9616521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205510.

The product of its digits is 3240, while the sum is 30.

The square root of 9616521 is about 3101.0515958300. The cubic root of 9616521 is about 212.6535618977.

The spelling of 9616521 in words is "nine million, six hundred sixteen thousand, five hundred twenty-one".