1656342 has 32 divisors (see below), whose sum is σ = 3784800. Its totient is φ = 536544.

The previous prime is 1656323. The next prime is 1656367. The reversal of 1656342 is 2436561.

1656342 is a `hidden beast` number, since 1 + 656 + 3 + 4 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1584 + ... + 2412.

It is an arithmetic number, because the mean of its divisors is an integer number (118275).

2^1656342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1892400).

1656342 is an abundant number, since it is smaller than the sum of its proper divisors (2128458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1656342 is a wasteful number, since it uses less digits than its factorization.

1656342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877 (or 871 counting only the distinct ones).

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

The square root of 1656342 is about 1286.9895104468. The cubic root of 1656342 is about 118.3177779372.

Adding to 1656342 its sum of digits (27), we get a square (1656369 = 1287²).

The spelling of 1656342 in words is "one million, six hundred fifty-six thousand, three hundred forty-two".