1245625 has 10 divisors (see below), whose sum is σ = 1557314. Its totient is φ = 996000.

The previous prime is 1245623. The next prime is 1245649. The reversal of 1245625 is 5265421.

It can be written as a sum of positive squares in 5 ways, for example, as 346921 + 898704 = 589^2 + 948^2 .

It is not a de Polignac number, because 1245625 - 2¹ = 1245623 is a prime.

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

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 1245625.

It is not an unprimeable number, because it can be changed into a prime (1245623) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 372 + ... + 1621.

2^1245625 is an apocalyptic number.

It is an amenable number.

1245625 is a deficient number, since it is larger than the sum of its proper divisors (311689).

1245625 is an frugal number, since it uses more digits than its factorization.

1245625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013 (or 1998 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 1245625 is about 1116.0757142775. The cubic root of 1245625 is about 107.5959122377.

Subtracting from 1245625 its product of digits (2400), we obtain a square (1243225 = 1115²).

The spelling of 1245625 in words is "one million, two hundred forty-five thousand, six hundred twenty-five".