965621 has 2 divisors, whose sum is σ = 965622. Its totient is φ = 965620.

The previous prime is 965611. The next prime is 965623. The reversal of 965621 is 126569.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 784996 + 180625 = 886^2 + 425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-965621 is a prime.

Together with 965623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (965623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 482810 + 482811.

It is an arithmetic number, because the mean of its divisors is an integer number (482811).

2⁹⁶⁵⁶²¹ is an apocalyptic number.

It is an amenable number.

965621 is a deficient number, since it is larger than the sum of its proper divisors (1).

965621 is an equidigital number, since it uses as much as digits as its factorization.

965621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 965621 is about 982.6601650622. The cubic root of 965621 is about 98.8406442183.

The spelling of 965621 in words is "nine hundred sixty-five thousand, six hundred twenty-one".