1218144 has 24 divisors (see below), whose sum is σ = 3197880. Its totient is φ = 406016.

The previous prime is 1218131. The next prime is 1218157. The reversal of 1218144 is 4418121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1218131) and next prime (1218157).

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1218144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6249 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (133245).

2^1218144 is an apocalyptic number.

It is an amenable number.

1218144 is an abundant number, since it is smaller than the sum of its proper divisors (1979736).

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

1218144 is a wasteful number, since it uses less digits than its factorization.

1218144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12702 (or 12694 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

The square root of 1218144 is about 1103.6956102114. The cubic root of 1218144 is about 106.7987599626.

The spelling of 1218144 in words is "one million, two hundred eighteen thousand, one hundred forty-four".