1218270 has 16 divisors (see below), whose sum is σ = 2923920. Its totient is φ = 324864.

The previous prime is 1218263. The next prime is 1218277. The reversal of 1218270 is 728121.

It is an interprime number because it is at equal distance from previous prime (1218263) and next prime (1218277).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20275 + ... + 20334.

It is an arithmetic number, because the mean of its divisors is an integer number (182745).

2^1218270 is an apocalyptic number.

1218270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218270 is an abundant number, since it is smaller than the sum of its proper divisors (1705650).

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

1218270 is a wasteful number, since it uses less digits than its factorization.

1218270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40619.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1218270 is about 1103.7526896909. The cubic root of 1218270 is about 106.8024421162.

The spelling of 1218270 in words is "one million, two hundred eighteen thousand, two hundred seventy".