1222860 has 48 divisors (see below), whose sum is σ = 3477600. Its totient is φ = 321024.

The previous prime is 1222853. The next prime is 1222889. The reversal of 1222860 is 682221.

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, 5226 + ... + 5454.

It is an arithmetic number, because the mean of its divisors is an integer number (72450).

2^1222860 is an apocalyptic number.

1222860 is a gapful number since it is divisible by the number (10) 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 1222860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738800).

1222860 is an abundant number, since it is smaller than the sum of its proper divisors (2254740).

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

1222860 is a wasteful number, since it uses less digits than its factorization.

1222860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1222860 is about 1105.8300050189. The cubic root of 1222860 is about 106.9364049853.

The spelling of 1222860 in words is "one million, two hundred twenty-two thousand, eight hundred sixty".