1206564 has 12 divisors (see below), whose sum is σ = 2815344. Its totient is φ = 402184.

The previous prime is 1206563. The next prime is 1206577. The reversal of 1206564 is 4656021.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1206563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50262 + ... + 50285.

It is an arithmetic number, because the mean of its divisors is an integer number (234612).

2^1206564 is an apocalyptic number.

It is an amenable number.

1206564 is an abundant number, since it is smaller than the sum of its proper divisors (1608780).

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

1206564 is a wasteful number, since it uses less digits than its factorization.

1206564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100554 (or 100552 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1206564 is about 1098.4370714793. The cubic root of 1206564 is about 106.4592627815.

It can be divided in two parts, 1206 and 564, that added together give a triangular number (1770 = T₅₉).

The spelling of 1206564 in words is "one million, two hundred six thousand, five hundred sixty-four".