1656229 has 2 divisors, whose sum is σ = 1656230. Its totient is φ = 1656228.

The previous prime is 1656227. The next prime is 1656247. The reversal of 1656229 is 9226561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1404225 + 252004 = 1185^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656229 - 2¹ = 1656227 is a prime.

Together with 1656227, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1656229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1656223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828114 + 828115.

It is an arithmetic number, because the mean of its divisors is an integer number (828115).

2^1656229 is an apocalyptic number.

It is an amenable number.

1656229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656229 is an equidigital number, since it uses as much as digits as its factorization.

1656229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 1656229 is about 1286.9456087963. The cubic root of 1656229 is about 118.3150872262.

The spelling of 1656229 in words is "one million, six hundred fifty-six thousand, two hundred twenty-nine".