1722528 has 36 divisors (see below), whose sum is σ = 4899258. Its totient is φ = 574080.

The previous prime is 1722481. The next prime is 1722529. The reversal of 1722528 is 8252271.

It can be written as a sum of positive squares in only one way, i.e., 1710864 + 11664 = 1308^2 + 108^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1722529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2703 + ... + 3278.

2^1722528 is an apocalyptic number.

1722528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1722528 is an abundant number, since it is smaller than the sum of its proper divisors (3176730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1722528 is a wasteful number, since it uses less digits than its factorization.

1722528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5997 (or 5986 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 1722528 is about 1312.4511419478. The cubic root of 1722528 is about 119.8731993939.

Adding to 1722528 its reverse (8252271), we get a palindrome (9974799).

The spelling of 1722528 in words is "one million, seven hundred twenty-two thousand, five hundred twenty-eight".