1662213 has 8 divisors (see below), whose sum is σ = 2532928. Its totient is φ = 949824.

The previous prime is 1662211. The next prime is 1662217. The reversal of 1662213 is 3122661.

It is a happy number.

1662213 is nontrivially palindromic in base 9.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1662213 - 2¹ = 1662211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 79153 = 1662213 / (1 + 6 + 6 + 2 + 2 + 1 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1662213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39556 + ... + 39597.

It is an arithmetic number, because the mean of its divisors is an integer number (316616).

2^1662213 is an apocalyptic number.

It is an amenable number.

1662213 is a deficient number, since it is larger than the sum of its proper divisors (870715).

1662213 is an equidigital number, since it uses as much as digits as its factorization.

1662213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79163.

The product of its digits is 432, while the sum is 21.

The square root of 1662213 is about 1289.2683971928. The cubic root of 1662213 is about 118.4574078268.

Adding to 1662213 its reverse (3122661), we get a palindrome (4784874).

The spelling of 1662213 in words is "one million, six hundred sixty-two thousand, two hundred thirteen".