1325556 has 18 divisors (see below), whose sum is σ = 3350802. Its totient is φ = 441840.

The previous prime is 1325543. The next prime is 1325557. The reversal of 1325556 is 6555231.

It can be written as a sum of positive squares in only one way, i.e., 1040400 + 285156 = 1020^2 + 534^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325557) 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 5 ways as a sum of consecutive naturals, for example, 18375 + ... + 18446.

2^1325556 is an apocalyptic number.

It is an amenable number.

1325556 is an abundant number, since it is smaller than the sum of its proper divisors (2025246).

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

1325556 is a wasteful number, since it uses less digits than its factorization.

1325556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36831 (or 36826 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 1325556 is about 1151.3279289586. The cubic root of 1325556 is about 109.8498226120.

It can be divided in two parts, 1325 and 556, that added together give a palindrome (1881).

The spelling of 1325556 in words is "one million, three hundred twenty-five thousand, five hundred fifty-six".