1218612 has 24 divisors (see below), whose sum is σ = 2864736. Its totient is φ = 403168.

The previous prime is 1218601. The next prime is 1218617. The reversal of 1218612 is 2168121.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218617) 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, 1783 + ... + 2369.

It is an arithmetic number, because the mean of its divisors is an integer number (119364).

2^1218612 is an apocalyptic number.

1218612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1218612 is an abundant number, since it is smaller than the sum of its proper divisors (1646124).

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

1218612 is a wasteful number, since it uses less digits than its factorization.

1218612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767 (or 765 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 1218612 is about 1103.9076048293. The cubic root of 1218612 is about 106.8124352534.

It can be divided in two parts, 1218 and 612, that added together give a triangular number (1830 = T₆₀).

The spelling of 1218612 in words is "one million, two hundred eighteen thousand, six hundred twelve".