1229872 has 40 divisors (see below), whose sum is σ = 2777600. Its totient is φ = 516672.

The previous prime is 1229869. The next prime is 1229873. The reversal of 1229872 is 2789221.

It is not an unprimeable number, because it can be changed into a prime (1229873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8779 + ... + 8917.

It is an arithmetic number, because the mean of its divisors is an integer number (69440).

2^1229872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1229872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388800).

1229872 is an abundant number, since it is smaller than the sum of its proper divisors (1547728).

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

1229872 is a wasteful number, since it uses less digits than its factorization.

1229872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 227 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 1229872 is about 1108.9959422829. The cubic root of 1229872 is about 107.1404101875.

The spelling of 1229872 in words is "one million, two hundred twenty-nine thousand, eight hundred seventy-two".