1229857 has 4 divisors (see below), whose sum is σ = 1237140. Its totient is φ = 1222576.

The previous prime is 1229827. The next prime is 1229869. The reversal of 1229857 is 7589221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 665856 + 564001 = 816^2 + 751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1229857 is a prime.

It is a Duffinian number.

1229857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1229807) 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 3 ways as a sum of consecutive naturals, for example, 3382 + ... + 3727.

It is an arithmetic number, because the mean of its divisors is an integer number (309285).

2^1229857 is an apocalyptic number.

It is an amenable number.

1229857 is a deficient number, since it is larger than the sum of its proper divisors (7283).

1229857 is an equidigital number, since it uses as much as digits as its factorization.

1229857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282.

The product of its digits is 10080, while the sum is 34.

The square root of 1229857 is about 1108.9891793881. The cubic root of 1229857 is about 107.1399746103.

The spelling of 1229857 in words is "one million, two hundred twenty-nine thousand, eight hundred fifty-seven".