1656043 has 2 divisors, whose sum is σ = 1656044. Its totient is φ = 1656042.

The previous prime is 1656019. The next prime is 1656047. The reversal of 1656043 is 3406561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1656043 - 2⁹ = 1655531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1655999 and 1656017.

It is not a weakly prime, because it can be changed into another prime (1656047) 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, 828021 + 828022.

It is an arithmetic number, because the mean of its divisors is an integer number (828022).

2^1656043 is an apocalyptic number.

1656043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656043 is an equidigital number, since it uses as much as digits as its factorization.

1656043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1656043 is about 1286.8733426410. The cubic root of 1656043 is about 118.3106580017.

The spelling of 1656043 in words is "one million, six hundred fifty-six thousand, forty-three".