1724213 has 4 divisors (see below), whose sum is σ = 1731180. Its totient is φ = 1717248.

The previous prime is 1724209. The next prime is 1724221. The reversal of 1724213 is 3124271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3124271 = 367 ⋅8513.

It can be written as a sum of positive squares in 2 ways, for example, as 1495729 + 228484 = 1223^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1724213 - 2² = 1724209 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 (1724263) 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, 3098 + ... + 3611.

It is an arithmetic number, because the mean of its divisors is an integer number (432795).

2^1724213 is an apocalyptic number.

It is an amenable number.

1724213 is a deficient number, since it is larger than the sum of its proper divisors (6967).

1724213 is an equidigital number, since it uses as much as digits as its factorization.

1724213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6966.

The product of its digits is 336, while the sum is 20.

The square root of 1724213 is about 1313.0929136965. The cubic root of 1724213 is about 119.9122738463.

Adding to 1724213 its reverse (3124271), we get a palindrome (4848484).

The spelling of 1724213 in words is "one million, seven hundred twenty-four thousand, two hundred thirteen".