90131025 has 48 divisors (see below), whose sum is σ = 158989824. Its totient is φ = 44897280.

The previous prime is 90131023. The next prime is 90131029. The reversal of 90131025 is 52013109.

It is not a de Polignac number, because 90131025 - 2¹ = 90131023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90130992 and 90131010.

It is not an unprimeable number, because it can be changed into a prime (90131023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 284167 + ... + 284483.

It is an arithmetic number, because the mean of its divisors is an integer number (3312288).

Almost surely, 2^90131025 is an apocalyptic number.

It is an amenable number.

90131025 is a deficient number, since it is larger than the sum of its proper divisors (68858799).

90131025 is a wasteful number, since it uses less digits than its factorization.

90131025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 90131025 is about 9493.7360928140. The cubic root of 90131025 is about 448.3578418200.

The spelling of 90131025 in words is "ninety million, one hundred thirty-one thousand, twenty-five".