90212 has 12 divisors (see below), whose sum is σ = 166320. Its totient is φ = 42696.
The previous prime is 90203. The next prime is 90217. The reversal of 90212 is 21209.
It is not an unprimeable number, because it can be changed into a prime (90217) by changing a digit.
90212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518 + ... + 669.
It is an arithmetic number, because the mean of its divisors is an integer number (13860).
290212 is an apocalyptic number.
It is an amenable number.
90212 is a deficient number, since it is larger than the sum of its proper divisors (76108).
90212 is a wasteful number, since it uses less digits than its factorization.
90212 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1210 (or 1208 counting only the distinct ones).
The product of its (nonzero) digits is 36, while the sum is 14.
The square root of 90212 is about 300.3531255040. The cubic root of 90212 is about 44.8492071993.
The spelling of 90212 in words is "ninety thousand, two hundred twelve".
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