1223566 has 8 divisors (see below), whose sum is σ = 1840824. Its totient is φ = 609960.

The previous prime is 1223561. The next prime is 1223569. The reversal of 1223566 is 6653221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1223566² = 2994227512712, which contains 22 as substring.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1223566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223561) 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 3 ways as a sum of consecutive naturals, for example, 196 + ... + 1576.

It is an arithmetic number, because the mean of its divisors is an integer number (230103).

2^1223566 is an apocalyptic number.

1223566 is a deficient number, since it is larger than the sum of its proper divisors (617258).

1223566 is a wasteful number, since it uses less digits than its factorization.

1223566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826.

The product of its digits is 2160, while the sum is 25.

The square root of 1223566 is about 1106.1491761964. The cubic root of 1223566 is about 106.9569804061.

Adding to 1223566 its reverse (6653221), we get a palindrome (7876787).

The spelling of 1223566 in words is "one million, two hundred twenty-three thousand, five hundred sixty-six".