1228839 has 8 divisors (see below), whose sum is σ = 1649520. Its totient is φ = 813696.

The previous prime is 1228837. The next prime is 1228841. The reversal of 1228839 is 9388221.

It is an interprime number because it is at equal distance from previous prime (1228837) and next prime (1228841).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1228839 - 2¹ = 1228837 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

1228839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228837) 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, 834 + ... + 1775.

It is an arithmetic number, because the mean of its divisors is an integer number (206190).

2^1228839 is an apocalyptic number.

1228839 is a deficient number, since it is larger than the sum of its proper divisors (420681).

1228839 is a wasteful number, since it uses less digits than its factorization.

1228839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769.

The product of its digits is 6912, while the sum is 33.

The square root of 1228839 is about 1108.5301078455. The cubic root of 1228839 is about 107.1104051559.

The spelling of 1228839 in words is "one million, two hundred twenty-eight thousand, eight hundred thirty-nine".