1290125 has 8 divisors (see below), whose sum is σ = 1610232. Its totient is φ = 1032000.

The previous prime is 1290109. The next prime is 1290131. The reversal of 1290125 is 5210921.

It can be written as a sum of positive squares in 4 ways, for example, as 42436 + 1247689 = 206^2 + 1117^2 .

It is not a de Polignac number, because 1290125 - 2⁴ = 1290109 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1290097 and 1290106.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 5036 + ... + 5285.

It is an arithmetic number, because the mean of its divisors is an integer number (201279).

2^1290125 is an apocalyptic number.

It is an amenable number.

1290125 is a deficient number, since it is larger than the sum of its proper divisors (320107).

1290125 is an equidigital number, since it uses as much as digits as its factorization.

1290125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10336 (or 10326 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1290125 is about 1135.8366960087. The cubic root of 1290125 is about 108.8622393404.

The spelling of 1290125 in words is "one million, two hundred ninety thousand, one hundred twenty-five".