1200564 has 18 divisors (see below), whose sum is σ = 3034850. Its totient is φ = 400176.

The previous prime is 1200527. The next prime is 1200581. The reversal of 1200564 is 4650021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1192464 + 8100 = 1092^2 + 90^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 16639 + ... + 16710.

2^1200564 is an apocalyptic number.

It is an amenable number.

1200564 is an abundant number, since it is smaller than the sum of its proper divisors (1834286).

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

1200564 is a wasteful number, since it uses less digits than its factorization.

1200564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33359 (or 33354 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1200564 is about 1095.7025143715. The cubic root of 1200564 is about 106.2825026283.

Adding to 1200564 its reverse (4650021), we get a palindrome (5850585).

It can be divided in two parts, 1200 and 564, that added together give a square (1764 = 42²).

The spelling of 1200564 in words is "one million, two hundred thousand, five hundred sixty-four".