957221 has 2 divisors, whose sum is σ = 957222. Its totient is φ = 957220.

The previous prime is 957211. The next prime is 957241. The reversal of 957221 is 122759.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 784996 + 172225 = 886^2 + 415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-957221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 957221.

It is not a weakly prime, because it can be changed into another prime (957211) 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 as a sum of consecutive naturals, namely, 478610 + 478611.

It is an arithmetic number, because the mean of its divisors is an integer number (478611).

2⁹⁵⁷²²¹ is an apocalyptic number.

It is an amenable number.

957221 is a deficient number, since it is larger than the sum of its proper divisors (1).

957221 is an equidigital number, since it uses as much as digits as its factorization.

957221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 26.

The square root of 957221 is about 978.3767168121. The cubic root of 957221 is about 98.5532020390.

The spelling of 957221 in words is "nine hundred fifty-seven thousand, two hundred twenty-one".