1656423 has 16 divisors (see below), whose sum is σ = 2534400. Its totient is φ = 1068120.

The previous prime is 1656383. The next prime is 1656427. The reversal of 1656423 is 3246561.

1656423 is a `hidden beast` number, since 1 + 656 + 4 + 2 + 3 = 666.

It is not a de Polignac number, because 1656423 - 2⁸ = 1656167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656427) 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 15 ways as a sum of consecutive naturals, for example, 153 + ... + 1826.

It is an arithmetic number, because the mean of its divisors is an integer number (158400).

2^1656423 is an apocalyptic number.

1656423 is a deficient number, since it is larger than the sum of its proper divisors (877977).

1656423 is a wasteful number, since it uses less digits than its factorization.

1656423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019 (or 2013 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1656423 is about 1287.0209788500. The cubic root of 1656423 is about 118.3197066016.

The spelling of 1656423 in words is "one million, six hundred fifty-six thousand, four hundred twenty-three".