1225625 has 20 divisors (see below), whose sum is σ = 1602612. Its totient is φ = 936000.

The previous prime is 1225621. The next prime is 1225643. The reversal of 1225625 is 5265221.

It can be written as a sum of positive squares in 10 ways, for example, as 541696 + 683929 = 736^2 + 827^2 .

It is not a de Polignac number, because 1225625 - 2² = 1225621 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225625.

It is not an unprimeable number, because it can be changed into a prime (1225621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23099 + ... + 23151.

2^1225625 is an apocalyptic number.

It is an amenable number.

1225625 is a deficient number, since it is larger than the sum of its proper divisors (376987).

1225625 is an frugal number, since it uses more digits than its factorization.

1225625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 95 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 1225625 is about 1107.0794912742. The cubic root of 1225625 is about 107.0169420286.

It can be divided in two parts, 1225 and 625, that multiplied together give a square (765625 = 875²).

The spelling of 1225625 in words is "one million, two hundred twenty-five thousand, six hundred twenty-five".