543564 has 48 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 155088.

The previous prime is 543553. The next prime is 543593. The reversal of 543564 is 465345.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397 + ... + 1115.

It is an arithmetic number, because the mean of its divisors is an integer number (33600).

2⁵⁴³⁵⁶⁴ is an apocalyptic number.

543564 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 543564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (806400).

543564 is an abundant number, since it is smaller than the sum of its proper divisors (1069236).

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

543564 is a wasteful number, since it uses less digits than its factorization.

543564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 731 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 543564 is about 737.2679295887. The cubic root of 543564 is about 81.6112873659.

The spelling of 543564 in words is "five hundred forty-three thousand, five hundred sixty-four".