1722349 has 4 divisors (see below), whose sum is σ = 1734880. Its totient is φ = 1709820.

The previous prime is 1722323. The next prime is 1722359. The reversal of 1722349 is 9432271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9432271 = 59 ⋅159869.

It is a cyclic number.

It is not a de Polignac number, because 1722349 - 2¹³ = 1714157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6057 + ... + 6334.

It is an arithmetic number, because the mean of its divisors is an integer number (433720).

2^1722349 is an apocalyptic number.

It is an amenable number.

1722349 is a deficient number, since it is larger than the sum of its proper divisors (12531).

1722349 is a wasteful number, since it uses less digits than its factorization.

1722349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12530.

The product of its digits is 3024, while the sum is 28.

The square root of 1722349 is about 1312.3829471614. The cubic root of 1722349 is about 119.8690469610.

It can be divided in two parts, 17 and 22349, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 1722349 in words is "one million, seven hundred twenty-two thousand, three hundred forty-nine".