1308213 has 12 divisors (see below), whose sum is σ = 1905228. Its totient is φ = 864960.

The previous prime is 1308193. The next prime is 1308221. The reversal of 1308213 is 3128031.

It can be written as a sum of positive squares in 2 ways, for example, as 815409 + 492804 = 903^2 + 702^2 .

It is not a de Polignac number, because 1308213 - 2⁹ = 1307701 is a prime.

It is a super-2 number, since 2×1308213² = 3422842506738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 703 + ... + 1763.

It is an arithmetic number, because the mean of its divisors is an integer number (158769).

2^1308213 is an apocalyptic number.

It is an amenable number.

1308213 is a deficient number, since it is larger than the sum of its proper divisors (597015).

1308213 is a wasteful number, since it uses less digits than its factorization.

1308213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1201 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1308213 is about 1143.7713932425. The cubic root of 1308213 is about 109.3686421338.

It can be divided in two parts, 1308 and 213, that added together give a square (1521 = 39²).

The spelling of 1308213 in words is "one million, three hundred eight thousand, two hundred thirteen".