1290625 has 24 divisors (see below), whose sum is σ = 1874880. Its totient is φ = 870000.

The previous prime is 1290607. The next prime is 1290629. The reversal of 1290625 is 5260921.

It is not a de Polignac number, because 1290625 - 2⁵ = 1290593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1290625.

It is not an unprimeable number, because it can be changed into a prime (1290629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21846 + ... + 21904.

It is an arithmetic number, because the mean of its divisors is an integer number (78120).

2^1290625 is an apocalyptic number.

It is an amenable number.

1290625 is a deficient number, since it is larger than the sum of its proper divisors (584255).

1290625 is an frugal number, since it uses more digits than its factorization.

1290625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1290625 is about 1136.0567767502. The cubic root of 1290625 is about 108.8763010500.

The spelling of 1290625 in words is "one million, two hundred ninety thousand, six hundred twenty-five".