90785225 has 12 divisors (see below), whose sum is σ = 116456460. Its totient is φ = 70123200.

The previous prime is 90785221. The next prime is 90785239. The reversal of 90785225 is 52258709.

It can be written as a sum of positive squares in 6 ways, for example, as 383161 + 90402064 = 619^2 + 9508^2 .

It is not a de Polignac number, because 90785225 - 2² = 90785221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90785221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61886 + ... + 63335.

It is an arithmetic number, because the mean of its divisors is an integer number (9704705).

Almost surely, 2^90785225 is an apocalyptic number.

It is an amenable number.

90785225 is a deficient number, since it is larger than the sum of its proper divisors (25671235).

90785225 is a wasteful number, since it uses less digits than its factorization.

90785225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125260 (or 125255 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 90785225 is about 9528.1280952766. The cubic root of 90785225 is about 449.4400029961.

The spelling of 90785225 in words is "ninety million, seven hundred eighty-five thousand, two hundred twenty-five".