1439213 has 4 divisors (see below), whose sum is σ = 1441788. Its totient is φ = 1436640.

The previous prime is 1439209. The next prime is 1439233. The reversal of 1439213 is 3129341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3129341 = 211 ⋅14831.

It can be written as a sum of positive squares in 2 ways, for example, as 178084 + 1261129 = 422^2 + 1123^2 .

It is a cyclic number.

It is not a de Polignac number, because 1439213 - 2² = 1439209 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 (1439233) 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, 56 + ... + 1697.

It is an arithmetic number, because the mean of its divisors is an integer number (360447).

2^1439213 is an apocalyptic number.

It is an amenable number.

1439213 is a deficient number, since it is larger than the sum of its proper divisors (2575).

1439213 is an equidigital number, since it uses as much as digits as its factorization.

1439213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574.

The product of its digits is 648, while the sum is 23.

The square root of 1439213 is about 1199.6720385172. The cubic root of 1439213 is about 112.9037476237.

The spelling of 1439213 in words is "one million, four hundred thirty-nine thousand, two hundred thirteen".