1290825 has 18 divisors (see below), whose sum is σ = 2312414. Its totient is φ = 688320.

The previous prime is 1290823. The next prime is 1290847. The reversal of 1290825 is 5280921.

It can be written as a sum of positive squares in 3 ways, for example, as 11664 + 1279161 = 108^2 + 1131^2 .

It is not a de Polignac number, because 1290825 - 2¹ = 1290823 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1290823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2644 + ... + 3093.

2^1290825 is an apocalyptic number.

1290825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1290825 is a deficient number, since it is larger than the sum of its proper divisors (1021589).

1290825 is a wasteful number, since it uses less digits than its factorization.

1290825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5753 (or 5745 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1290825 is about 1136.1447971099. The cubic root of 1290825 is about 108.8819247170.

The spelling of 1290825 in words is "one million, two hundred ninety thousand, eight hundred twenty-five".