1212857 has 2 divisors, whose sum is σ = 1212858. Its totient is φ = 1212856.

The previous prime is 1212853. The next prime is 1212877. The reversal of 1212857 is 7582121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817216 + 395641 = 904^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212857 - 2² = 1212853 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1212851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606428 + 606429.

It is an arithmetic number, because the mean of its divisors is an integer number (606429).

2^1212857 is an apocalyptic number.

It is an amenable number.

1212857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212857 is an equidigital number, since it uses as much as digits as its factorization.

1212857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 26.

The square root of 1212857 is about 1101.2978706962. The cubic root of 1212857 is about 106.6440262278.

Adding to 1212857 its reverse (7582121), we get a palindrome (8794978).

The spelling of 1212857 in words is "one million, two hundred twelve thousand, eight hundred fifty-seven".