1722725 has 6 divisors (see below), whose sum is σ = 2136210. Its totient is φ = 1378160.

The previous prime is 1722719. The next prime is 1722731. The reversal of 1722725 is 5272271.

It is an interprime number because it is at equal distance from previous prime (1722719) and next prime (1722731).

It can be written as a sum of positive squares in 3 ways, for example, as 229441 + 1493284 = 479^2 + 1222^2 .

It is not a de Polignac number, because 1722725 - 2¹⁶ = 1657189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1722694 and 1722703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34430 + ... + 34479.

It is an arithmetic number, because the mean of its divisors is an integer number (356035).

2^1722725 is an apocalyptic number.

It is an amenable number.

1722725 is a deficient number, since it is larger than the sum of its proper divisors (413485).

1722725 is an equidigital number, since it uses as much as digits as its factorization.

1722725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68919 (or 68914 counting only the distinct ones).

The product of its digits is 1960, while the sum is 26.

The square root of 1722725 is about 1312.5261902149. The cubic root of 1722725 is about 119.8777690574.

Adding to 1722725 its reverse (5272271), we get a palindrome (6994996).

The spelling of 1722725 in words is "one million, seven hundred twenty-two thousand, seven hundred twenty-five".