1218672 has 160 divisors (see below), whose sum is σ = 4444160. Its totient is φ = 311040.

The previous prime is 1218653. The next prime is 1218683. The reversal of 1218672 is 2768121.

It is a super-2 number, since 2×1218672² = 2970322887168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

Its product of digits (1344) is a multiple of the sum of its prime divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39297 + ... + 39327.

It is an arithmetic number, because the mean of its divisors is an integer number (27776).

2^1218672 is an apocalyptic number.

1218672 is a gapful number since it is divisible by the number (12) 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 1218672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2222080).

1218672 is an abundant number, since it is smaller than the sum of its proper divisors (3225488).

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

1218672 is a wasteful number, since it uses less digits than its factorization.

1218672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 56 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1218672 is about 1103.9347806823. The cubic root of 1218672 is about 106.8141882425.

The spelling of 1218672 in words is "one million, two hundred eighteen thousand, six hundred seventy-two".