1566406 has 16 divisors (see below), whose sum is σ = 2462400. Its totient is φ = 746368.

The previous prime is 1566403. The next prime is 1566427. The reversal of 1566406 is 6046651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6435 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (153900).

2^1566406 is an apocalyptic number.

1566406 is a deficient number, since it is larger than the sum of its proper divisors (895994).

1566406 is a wasteful number, since it uses less digits than its factorization.

1566406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1566406 is about 1251.5614247811. The cubic root of 1566406 is about 116.1363339578.

The spelling of 1566406 in words is "one million, five hundred sixty-six thousand, four hundred six".