1722529 has 2 divisors, whose sum is σ = 1722530. Its totient is φ = 1722528.

The previous prime is 1722481. The next prime is 1722551. The reversal of 1722529 is 9252271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960400 + 762129 = 980^2 + 873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1722529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1722497 and 1722506.

It is not a weakly prime, because it can be changed into another prime (1722599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861264 + 861265.

It is an arithmetic number, because the mean of its divisors is an integer number (861265).

2^1722529 is an apocalyptic number.

It is an amenable number.

1722529 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722529 is an equidigital number, since it uses as much as digits as its factorization.

1722529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 1722529 is about 1312.4515229143. The cubic root of 1722529 is about 119.8732225911.

It can be divided in two parts, 172 and 2529, that added together give a triangular number (2701 = T₇₃).

The spelling of 1722529 in words is "one million, seven hundred twenty-two thousand, five hundred twenty-nine".