90145825 has 24 divisors (see below), whose sum is σ = 139366080. Its totient is φ = 56193600.

The previous prime is 90145817. The next prime is 90145829. The reversal of 90145825 is 52854109.

It is not a de Polignac number, because 90145825 - 2³ = 90145817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90145829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21490 + ... + 25339.

It is an arithmetic number, because the mean of its divisors is an integer number (5806920).

Almost surely, 2^90145825 is an apocalyptic number.

It is an amenable number.

90145825 is a deficient number, since it is larger than the sum of its proper divisors (49220255).

90145825 is a wasteful number, since it uses less digits than its factorization.

90145825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46857 (or 46852 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 90145825 is about 9494.5155221317. The cubic root of 90145825 is about 448.3823814015.

The spelling of 90145825 in words is "ninety million, one hundred forty-five thousand, eight hundred twenty-five".