1373213 has 4 divisors (see below), whose sum is σ = 1406748. Its totient is φ = 1339680.

The previous prime is 1373201. The next prime is 1373219. The reversal of 1373213 is 3123731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3123731 = 13 ⋅240287.

It can be written as a sum of positive squares in 2 ways, for example, as 822649 + 550564 = 907^2 + 742^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373213 - 2⁸ = 1372957 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 (1373219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16706 + ... + 16787.

It is an arithmetic number, because the mean of its divisors is an integer number (351687).

2^1373213 is an apocalyptic number.

It is an amenable number.

1373213 is a deficient number, since it is larger than the sum of its proper divisors (33535).

1373213 is an equidigital number, since it uses as much as digits as its factorization.

1373213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33534.

The product of its digits is 378, while the sum is 20.

The square root of 1373213 is about 1171.8417128606. The cubic root of 1373213 is about 111.1508108877.

Adding to 1373213 its reverse (3123731), we get a palindrome (4496944).

The spelling of 1373213 in words is "one million, three hundred seventy-three thousand, two hundred thirteen".