1218140 has 72 divisors (see below), whose sum is σ = 3274992. Its totient is φ = 376320.

The previous prime is 1218131. The next prime is 1218157. The reversal of 1218140 is 418121.

1218140 = 29³ + 30³ + ... + 48³.

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, 10724 + ... + 10836.

It is an arithmetic number, because the mean of its divisors is an integer number (45486).

2^1218140 is an apocalyptic number.

1218140 is a gapful number since it is divisible by the number (10) 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 1218140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1637496).

1218140 is an abundant number, since it is smaller than the sum of its proper divisors (2056852).

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

1218140 is a wasteful number, since it uses less digits than its factorization.

1218140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1218140 is about 1103.6937981161. The cubic root of 1218140 is about 106.7986430647.

It can be divided in two parts, 12181 and 40, that added together give a palindrome (12221).

The spelling of 1218140 in words is "one million, two hundred eighteen thousand, one hundred forty".