1212851 has 2 divisors, whose sum is σ = 1212852. Its totient is φ = 1212850.

The previous prime is 1212847. The next prime is 1212853. The reversal of 1212851 is 1582121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212851 - 2² = 1212847 is a prime.

Together with 1212853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1212853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606425 + 606426.

It is an arithmetic number, because the mean of its divisors is an integer number (606426).

2^1212851 is an apocalyptic number.

1212851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212851 is an equidigital number, since it uses as much as digits as its factorization.

1212851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160, while the sum is 20.

The square root of 1212851 is about 1101.2951466342. The cubic root of 1212851 is about 106.6438503716.

Adding to 1212851 its reverse (1582121), we get a palindrome (2794972).

The spelling of 1212851 in words is "one million, two hundred twelve thousand, eight hundred fifty-one".