90842525 has 18 divisors (see below), whose sum is σ = 117772410. Its totient is φ = 69504160.

The previous prime is 90842519. The next prime is 90842527. The reversal of 90842525 is 52524809.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 611524 + 90231001 = 782^2 + 9499^2 .

It is a de Polignac number, because none of the positive numbers 2^k-90842525 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90842527) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9791 + ... + 16659.

Almost surely, 2^90842525 is an apocalyptic number.

It is an amenable number.

90842525 is a deficient number, since it is larger than the sum of its proper divisors (26929885).

90842525 is a wasteful number, since it uses less digits than its factorization.

90842525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6925 (or 6897 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 90842525 is about 9531.1345074970. The cubic root of 90842525 is about 449.5345392895.

The spelling of 90842525 in words is "ninety million, eight hundred forty-two thousand, five hundred twenty-five".