990125 has 12 divisors (see below), whose sum is σ = 1249716. Its totient is φ = 783200.

The previous prime is 990053. The next prime is 990137. The reversal of 990125 is 521099.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 643204 + 346921 = 802^2 + 589^2 .

It is not a de Polignac number, because 990125 - 2⁸ = 989869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990094 and 990103.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990125.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11081 + ... + 11169.

It is an arithmetic number, because the mean of its divisors is an integer number (104143).

2⁹⁹⁰¹²⁵ is an apocalyptic number.

It is an amenable number.

990125 is a deficient number, since it is larger than the sum of its proper divisors (259591).

990125 is an frugal number, since it uses more digits than its factorization.

990125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 990125 is about 995.0502499874. The cubic root of 990125 is about 99.6697438427.

Subtracting from 990125 its sum of digits (26), we obtain a palindrome (990099).

The spelling of 990125 in words is "nine hundred ninety thousand, one hundred twenty-five".