1722025 has 6 divisors (see below), whose sum is σ = 2135342. Its totient is φ = 1377600.

The previous prime is 1722013. The next prime is 1722029. The reversal of 1722025 is 5202271.

It can be written as a sum of positive squares in 3 ways, for example, as 21609 + 1700416 = 147^2 + 1304^2 .

It is not a de Polignac number, because 1722025 - 2⁹ = 1721513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1721993 and 1722011.

It is not an unprimeable number, because it can be changed into a prime (1722029) 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, 34416 + ... + 34465.

2^1722025 is an apocalyptic number.

It is an amenable number.

1722025 is a deficient number, since it is larger than the sum of its proper divisors (413317).

1722025 is an equidigital number, since it uses as much as digits as its factorization.

1722025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68891 (or 68886 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 1722025 is about 1312.2595017755. The cubic root of 1722025 is about 119.8615300936.

Adding to 1722025 its reverse (5202271), we get a palindrome (6924296).

It can be divided in two parts, 172 and 2025, that added together give a cube (2197 = 13³).

The spelling of 1722025 in words is "one million, seven hundred twenty-two thousand, twenty-five".