1228939 has 8 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 1146600.

The previous prime is 1228937. The next prime is 1228943. The reversal of 1228939 is 9398221.

1228939 = 161² + 162² + ... + 198².

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

It is a cyclic number.

It is not a de Polignac number, because 1228939 - 2¹ = 1228937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228937) 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, 894 + ... + 1804.

It is an arithmetic number, because the mean of its divisors is an integer number (164160).

2^1228939 is an apocalyptic number.

1228939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1228939 is a deficient number, since it is larger than the sum of its proper divisors (84341).

1228939 is an equidigital number, since it uses as much as digits as its factorization.

1228939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001.

The product of its digits is 7776, while the sum is 34.

The square root of 1228939 is about 1108.5752117019. The cubic root of 1228939 is about 107.1133105406.

The spelling of 1228939 in words is "one million, two hundred twenty-eight thousand, nine hundred thirty-nine".