1325566 has 16 divisors (see below), whose sum is σ = 2196720. Its totient is φ = 594880.

The previous prime is 1325557. The next prime is 1325567. The reversal of 1325566 is 6655231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325567) 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, 1620 + ... + 2296.

It is an arithmetic number, because the mean of its divisors is an integer number (137295).

2^1325566 is an apocalyptic number.

1325566 is a deficient number, since it is larger than the sum of its proper divisors (871154).

1325566 is a wasteful number, since it uses less digits than its factorization.

1325566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779.

The product of its digits is 5400, while the sum is 28.

The square root of 1325566 is about 1151.3322717617. The cubic root of 1325566 is about 109.8500988471.

It can be divided in two parts, 1325 and 566, that added together give a triangular number (1891 = T₆₁).

The spelling of 1325566 in words is "one million, three hundred twenty-five thousand, five hundred sixty-six".