1222998 has 32 divisors (see below), whose sum is σ = 2874624. Its totient is φ = 339552.

The previous prime is 1222993. The next prime is 1223003. The reversal of 1222998 is 8992221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1222993) and next prime (1223003).

It is an Ulam number.

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, 1161 + ... + 1947.

It is an arithmetic number, because the mean of its divisors is an integer number (89832).

2^1222998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437312).

1222998 is an abundant number, since it is smaller than the sum of its proper divisors (1651626).

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

1222998 is a wasteful number, since it uses less digits than its factorization.

1222998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836.

The product of its digits is 5184, while the sum is 33.

The square root of 1222998 is about 1105.8923998292. The cubic root of 1222998 is about 106.9404274323.

The spelling of 1222998 in words is "one million, two hundred twenty-two thousand, nine hundred ninety-eight".