1822525 has 6 divisors (see below), whose sum is σ = 2259962. Its totient is φ = 1458000.

The previous prime is 1822517. The next prime is 1822529. The reversal of 1822525 is 5252281.

It can be written as a sum of positive squares in 3 ways, for example, as 649636 + 1172889 = 806^2 + 1083^2 .

It is not a de Polignac number, because 1822525 - 2³ = 1822517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 72901 = 1822525 / (1 + 8 + 2 + 2 + 5 + 2 + 5).

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 1822525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36426 + ... + 36475.

2^1822525 is an apocalyptic number.

It is an amenable number.

1822525 is a deficient number, since it is larger than the sum of its proper divisors (437437).

1822525 is an equidigital number, since it uses as much as digits as its factorization.

1822525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72911 (or 72906 counting only the distinct ones).

The product of its digits is 1600, while the sum is 25.

The square root of 1822525 is about 1350.0092592275. The cubic root of 1822525 is about 122.1493512664.

Subtracting from 1822525 its sum of digits (25), we obtain a square (1822500 = 1350²).

It can be divided in two parts, 18225 and 25, that multiplied together give a square (455625 = 675²).

The spelling of 1822525 in words is "one million, eight hundred twenty-two thousand, five hundred twenty-five".