1724249 has 4 divisors (see below), whose sum is σ = 1756836. Its totient is φ = 1691664.

The previous prime is 1724227. The next prime is 1724263. The reversal of 1724249 is 9424271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9424271 = 131 ⋅71941.

It can be written as a sum of positive squares in 2 ways, for example, as 868624 + 855625 = 932^2 + 925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1724249 is a prime.

It is a super-2 number, since 2×1724249² = 5946069228002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1724209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16214 + ... + 16319.

It is an arithmetic number, because the mean of its divisors is an integer number (439209).

2^1724249 is an apocalyptic number.

It is an amenable number.

1724249 is a deficient number, since it is larger than the sum of its proper divisors (32587).

1724249 is an equidigital number, since it uses as much as digits as its factorization.

1724249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32586.

The product of its digits is 4032, while the sum is 29.

The square root of 1724249 is about 1313.1066217181. The cubic root of 1724249 is about 119.9131083936.

The spelling of 1724249 in words is "one million, seven hundred twenty-four thousand, two hundred forty-nine".