1566642 has 32 divisors (see below), whose sum is σ = 3907584. Its totient is φ = 406800.

The previous prime is 1566637. The next prime is 1566659. The reversal of 1566642 is 2466651.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 1234 + ... + 2157.

It is an arithmetic number, because the mean of its divisors is an integer number (122112).

2^1566642 is an apocalyptic number.

1566642 is an abundant number, since it is smaller than the sum of its proper divisors (2340942).

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

1566642 is a wasteful number, since it uses less digits than its factorization.

1566642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414.

The product of its digits is 8640, while the sum is 30.

The square root of 1566642 is about 1251.6557034584. The cubic root of 1566642 is about 116.1421661619.

Subtracting 1566642 from its reverse (2466651), we obtain a palindrome (900009).

The spelling of 1566642 in words is "one million, five hundred sixty-six thousand, six hundred forty-two".