1722481 has 2 divisors, whose sum is σ = 1722482. Its totient is φ = 1722480.

The previous prime is 1722463. The next prime is 1722529. The reversal of 1722481 is 1842271.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1575025 + 147456 = 1255^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722481 - 2⁵ = 1722449 is a prime.

It is a super-2 number, since 2×1722481² = 5933881590722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1722431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861240 + 861241.

It is an arithmetic number, because the mean of its divisors is an integer number (861241).

2^1722481 is an apocalyptic number.

It is an amenable number.

1722481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722481 is an equidigital number, since it uses as much as digits as its factorization.

1722481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 25.

The square root of 1722481 is about 1312.4332363972. The cubic root of 1722481 is about 119.8721091181.

The spelling of 1722481 in words is "one million, seven hundred twenty-two thousand, four hundred eighty-one".