1218546 has 48 divisors (see below), whose sum is σ = 3182400. Its totient is φ = 329184.

The previous prime is 1218533. The next prime is 1218557. The reversal of 1218546 is 6458121.

It is an Ulam number.

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2140 + ... + 2648.

It is an arithmetic number, because the mean of its divisors is an integer number (66300).

2^1218546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1591200).

1218546 is an abundant number, since it is smaller than the sum of its proper divisors (1963854).

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

1218546 is a wasteful number, since it uses less digits than its factorization.

1218546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 540 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1218546 is about 1103.8777106183. The cubic root of 1218546 is about 106.8105068988.

It can be divided in two parts, 1218 and 546, that added together give a square (1764 = 42²).

The spelling of 1218546 in words is "one million, two hundred eighteen thousand, five hundred forty-six".