1225566 has 12 divisors (see below), whose sum is σ = 2655432. Its totient is φ = 408516.

The previous prime is 1225559. The next prime is 1225571. The reversal of 1225566 is 6655221.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34026 + ... + 34061.

It is an arithmetic number, because the mean of its divisors is an integer number (221286).

2^1225566 is an apocalyptic number.

1225566 is an abundant number, since it is smaller than the sum of its proper divisors (1429866).

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

1225566 is a wasteful number, since it uses less digits than its factorization.

1225566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68095 (or 68092 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1225566 is about 1107.0528442672. The cubic root of 1225566 is about 107.0152247821.

It can be divided in two parts, 12255 and 66, that added together give a palindrome (12321).

The spelling of 1225566 in words is "one million, two hundred twenty-five thousand, five hundred sixty-six".