1222872 has 64 divisors (see below), whose sum is σ = 3628800. Its totient is φ = 336000.

The previous prime is 1222853. The next prime is 1222889. The reversal of 1222872 is 2782221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4747 + ... + 4997.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2^1222872 is an apocalyptic number.

1222872 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 1222872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814400).

1222872 is an abundant number, since it is smaller than the sum of its proper divisors (2405928).

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

1222872 is a wasteful number, since it uses less digits than its factorization.

1222872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 292 counting only the distinct ones).

The product of its digits is 896, while the sum is 24.

The square root of 1222872 is about 1105.8354307943. The cubic root of 1222872 is about 106.9367547753.

The spelling of 1222872 in words is "one million, two hundred twenty-two thousand, eight hundred seventy-two".