1662229 has 2 divisors, whose sum is σ = 1662230. Its totient is φ = 1662228.

The previous prime is 1662223. The next prime is 1662257. The reversal of 1662229 is 9222661.

It is an a-pointer prime, because the next prime (1662257) can be obtained adding 1662229 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1500625 + 161604 = 1225^2 + 402^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662229 - 2¹⁷ = 1531157 is a prime.

It is a super-3 number, since 3×1662229³ = 13778242353332504967, which contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1662197 and 1662206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 831114 + 831115.

It is an arithmetic number, because the mean of its divisors is an integer number (831115).

2^1662229 is an apocalyptic number.

It is an amenable number.

1662229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662229 is an equidigital number, since it uses as much as digits as its factorization.

1662229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 1662229 is about 1289.2746022473. The cubic root of 1662229 is about 118.4577879049.

It can be divided in two parts, 1662 and 229, that added together give a triangular number (1891 = T₆₁).

The spelling of 1662229 in words is "one million, six hundred sixty-two thousand, two hundred twenty-nine".