90021325 has 6 divisors (see below), whose sum is σ = 111626474. Its totient is φ = 72017040.

The previous prime is 90021313. The next prime is 90021329. The reversal of 90021325 is 52312009.

It can be written as a sum of positive squares in 3 ways, for example, as 7193124 + 82828201 = 2682^2 + 9101^2 .

It is not a de Polignac number, because 90021325 - 2¹⁵ = 89988557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90021296 and 90021305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90021329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1800402 + ... + 1800451.

Almost surely, 2^90021325 is an apocalyptic number.

It is an amenable number.

90021325 is a deficient number, since it is larger than the sum of its proper divisors (21605149).

90021325 is a wasteful number, since it uses less digits than its factorization.

90021325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600863 (or 3600858 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 90021325 is about 9487.9568401211. The cubic root of 90021325 is about 448.1758666592.

The spelling of 90021325 in words is "ninety million, twenty-one thousand, three hundred twenty-five".