9125621 has 2 divisors, whose sum is σ = 9125622. Its totient is φ = 9125620.

The previous prime is 9125609. The next prime is 9125639. The reversal of 9125621 is 1265219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4774225 + 4351396 = 2185^2 + 2086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9125621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9125671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4562810 + 4562811.

It is an arithmetic number, because the mean of its divisors is an integer number (4562811).

Almost surely, 2^9125621 is an apocalyptic number.

It is an amenable number.

9125621 is a deficient number, since it is larger than the sum of its proper divisors (1).

9125621 is an equidigital number, since it uses as much as digits as its factorization.

9125621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 9125621 is about 3020.8642803013. The cubic root of 9125621 is about 208.9717001127.

The spelling of 9125621 in words is "nine million, one hundred twenty-five thousand, six hundred twenty-one".