90250 has 24 divisors (see below), whose sum is σ = 178308.
Its totient is φ = 34200.
The previous prime is 90247. The next prime is 90263. The reversal of 90250 is 5209.
Multipling 90250 by its product of nonzero digits (90), we get a square (8122500 = 28502).
Adding to 90250 its reverse (5209), we get a palindrome (95459).
It can be divided in two parts, 90 and 250, that multiplied together give a square (22500 = 1502).
It can be written as a sum of positive squares in 2 ways, for example, as 61009 + 29241 = 247^2 + 171^2
It is an Ulam number.
It is an unprimeable number.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4741 + ... + 4759.
290250 is an apocalyptic number.
90250 is a deficient number, since it is larger than the sum of its proper divisors (88058).
90250 is a wasteful number, since it uses less digits than its factorization.
90250 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 55 (or 26 counting only the distinct ones).
The product of its (nonzero) digits is 90, while the sum is 16.
The square root of 90250 is about 300.4163777160.
The cubic root of 90250 is about 44.8555035923.
The spelling of 90250 in words is "ninety thousand, two hundred fifty".