1228992 has 56 divisors (see below), whose sum is σ = 3358896. Its totient is φ = 396288.

The previous prime is 1228987. The next prime is 1228993. The reversal of 1228992 is 2998221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1228993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7018 + ... + 7190.

2^1228992 is an apocalyptic number.

1228992 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 1228992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679448).

1228992 is an abundant number, since it is smaller than the sum of its proper divisors (2129904).

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

1228992 is a wasteful number, since it uses less digits than its factorization.

1228992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 215 counting only the distinct ones).

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

The square root of 1228992 is about 1108.5991160018. The cubic root of 1228992 is about 107.1148503305.

The spelling of 1228992 in words is "one million, two hundred twenty-eight thousand, nine hundred ninety-two".