1222688 has 24 divisors (see below), whose sum is σ = 2535120. Its totient is φ = 578880.

The previous prime is 1222681. The next prime is 1222693. The reversal of 1222688 is 8862221.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1222688.

It is not an unprimeable number, because it can be changed into a prime (1222681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (105630).

2^1222688 is an apocalyptic number.

It is an amenable number.

1222688 is an abundant number, since it is smaller than the sum of its proper divisors (1312432).

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

1222688 is a wasteful number, since it uses less digits than its factorization.

1222688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040 (or 2032 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 1222688 is about 1105.7522326453. The cubic root of 1222688 is about 106.9313910769.

The spelling of 1222688 in words is "one million, two hundred twenty-two thousand, six hundred eighty-eight".