1662233 has 4 divisors (see below), whose sum is σ = 1734528. Its totient is φ = 1589940.

The previous prime is 1662229. The next prime is 1662257. The reversal of 1662233 is 3322661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1662233 - 2² = 1662229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 72271 = 1662233 / (1 + 6 + 6 + 2 + 2 + 3 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1662199 and 1662208.

It is not an unprimeable number, because it can be changed into a prime (1662223) 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, 36113 + ... + 36158.

It is an arithmetic number, because the mean of its divisors is an integer number (433632).

2^1662233 is an apocalyptic number.

It is an amenable number.

1662233 is a deficient number, since it is larger than the sum of its proper divisors (72295).

1662233 is an equidigital number, since it uses as much as digits as its factorization.

1662233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72294.

The product of its digits is 1296, while the sum is 23.

The square root of 1662233 is about 1289.2761535063. The cubic root of 1662233 is about 118.4578829241.

Adding to 1662233 its reverse (3322661), we get a palindrome (4984894).

The spelling of 1662233 in words is "one million, six hundred sixty-two thousand, two hundred thirty-three".