1218260 has 12 divisors (see below), whose sum is σ = 2558388. Its totient is φ = 487296.

The previous prime is 1218257. The next prime is 1218263. The reversal of 1218260 is 628121.

It is an interprime number because it is at equal distance from previous prime (1218257) and next prime (1218263).

It can be written as a sum of positive squares in 2 ways, for example, as 132496 + 1085764 = 364^2 + 1042^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 60913 = 1218260 / (1 + 2 + 1 + 8 + 2 + 6 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218263) 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, 30437 + ... + 30476.

It is an arithmetic number, because the mean of its divisors is an integer number (213199).

2^1218260 is an apocalyptic number.

1218260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1218260 is an abundant number, since it is smaller than the sum of its proper divisors (1340128).

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

1218260 is a wasteful number, since it uses less digits than its factorization.

1218260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60922 (or 60920 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1218260 is about 1103.7481596814. The cubic root of 1218260 is about 106.8021498910.

The spelling of 1218260 in words is "one million, two hundred eighteen thousand, two hundred sixty".