1397213 has 4 divisors (see below), whose sum is σ = 1479420. Its totient is φ = 1315008.

The previous prime is 1397189. The next prime is 1397219. The reversal of 1397213 is 3127931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 822649 + 574564 = 907^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397213 - 2¹⁰ = 1396189 is a prime.

It is a super-4 number, since 4×1397213⁴ (a number of 26 digits) contains 4444 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397219) 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, 41078 + ... + 41111.

It is an arithmetic number, because the mean of its divisors is an integer number (369855).

2^1397213 is an apocalyptic number.

It is an amenable number.

1397213 is a deficient number, since it is larger than the sum of its proper divisors (82207).

1397213 is an equidigital number, since it uses as much as digits as its factorization.

1397213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82206.

The product of its digits is 1134, while the sum is 26.

The square root of 1397213 is about 1182.0376474546. The cubic root of 1397213 is about 111.7946118927.

The spelling of 1397213 in words is "one million, three hundred ninety-seven thousand, two hundred thirteen".