1566022 has 4 divisors (see below), whose sum is σ = 2349036. Its totient is φ = 783010.

The previous prime is 1565987. The next prime is 1566031. The reversal of 1566022 is 2206651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2206651 = 17 ⋅129803.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1565984 and 1566002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391504 + ... + 391507.

It is an arithmetic number, because the mean of its divisors is an integer number (587259).

2^1566022 is an apocalyptic number.

1566022 is a deficient number, since it is larger than the sum of its proper divisors (783014).

1566022 is an equidigital number, since it uses as much as digits as its factorization.

1566022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783013.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1566022 is about 1251.4080070065. The cubic root of 1566022 is about 116.1268430176.

The spelling of 1566022 in words is "one million, five hundred sixty-six thousand, twenty-two".