90002025 has 18 divisors (see below), whose sum is σ = 161204030. Its totient is φ = 48000960.

The previous prime is 90001999. The next prime is 90002041. The reversal of 90002025 is 52020009.

It can be written as a sum of positive squares in 3 ways, for example, as 22581504 + 67420521 = 4752^2 + 8211^2 .

It is not a de Polignac number, because 90002025 - 2²⁵ = 56447593 is a prime.

90002025 is a modest number, since divided by 2025 gives 900 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90001989 and 90002007.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 199780 + ... + 200229.

Almost surely, 2^90002025 is an apocalyptic number.

It is an amenable number.

90002025 is a deficient number, since it is larger than the sum of its proper divisors (71202005).

90002025 is a wasteful number, since it uses less digits than its factorization.

90002025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400025 (or 400017 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 90002025 is about 9486.9397067758. The cubic root of 90002025 is about 448.1438356841.

It can be divided in two parts, 9000 and 2025, that added together give a square (11025 = 105²).

The spelling of 90002025 in words is "ninety million, two thousand, twenty-five".