1218552 has 16 divisors (see below), whose sum is σ = 3046440. Its totient is φ = 406176.

The previous prime is 1218533. The next prime is 1218557. The reversal of 1218552 is 2558121.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 50773 = 1218552 / (1 + 2 + 1 + 8 + 5 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218557) 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, 25363 + ... + 25410.

2^1218552 is an apocalyptic number.

1218552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1218552 is an abundant number, since it is smaller than the sum of its proper divisors (1827888).

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

1218552 is a wasteful number, since it uses less digits than its factorization.

1218552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50782 (or 50778 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 1218552 is about 1103.8804283073. The cubic root of 1218552 is about 106.8106822066.

It can be divided in two parts, 1218 and 552, that added together give a triangular number (1770 = T₅₉).

The spelling of 1218552 in words is "one million, two hundred eighteen thousand, five hundred fifty-two".