1222992 has 80 divisors (see below), whose sum is σ = 3720000. Its totient is φ = 383616.

The previous prime is 1222967. The next prime is 1222993. The reversal of 1222992 is 2992221.

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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8134 + ... + 8282.

It is an arithmetic number, because the mean of its divisors is an integer number (46500).

2^1222992 is an apocalyptic number.

1222992 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 1222992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1860000).

1222992 is an abundant number, since it is smaller than the sum of its proper divisors (2497008).

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

1222992 is a wasteful number, since it uses less digits than its factorization.

1222992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 173 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1222992 is about 1105.8896870846. The cubic root of 1222992 is about 106.9402525496.

It can be divided in two parts, 12229 and 92, that added together give a palindrome (12321).

The spelling of 1222992 in words is "one million, two hundred twenty-two thousand, nine hundred ninety-two".