1228929 has 8 divisors (see below), whose sum is σ = 1764672. Its totient is φ = 756240.

The previous prime is 1228919. The next prime is 1228937. The reversal of 1228929 is 9298221.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1228929 is a prime.

1228929 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1228929.

It is not an unprimeable number, because it can be changed into a prime (1228919) 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, 15717 + ... + 15794.

It is an arithmetic number, because the mean of its divisors is an integer number (220584).

2^1228929 is an apocalyptic number.

It is an amenable number.

1228929 is a deficient number, since it is larger than the sum of its proper divisors (535743).

1228929 is a wasteful number, since it uses less digits than its factorization.

1228929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31527.

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

The square root of 1228929 is about 1108.5707013989. The cubic root of 1228929 is about 107.1130200092.

The spelling of 1228929 in words is "one million, two hundred twenty-eight thousand, nine hundred twenty-nine".