1222751 has 2 divisors, whose sum is σ = 1222752. Its totient is φ = 1222750.

The previous prime is 1222729. The next prime is 1222757. The reversal of 1222751 is 1572221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222751 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611375 + 611376.

It is an arithmetic number, because the mean of its divisors is an integer number (611376).

2^1222751 is an apocalyptic number.

1222751 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222751 is an equidigital number, since it uses as much as digits as its factorization.

1222751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280, while the sum is 20.

The square root of 1222751 is about 1105.7807196728. The cubic root of 1222751 is about 106.9332276211.

Adding to 1222751 its reverse (1572221), we get a palindrome (2794972).

The spelling of 1222751 in words is "one million, two hundred twenty-two thousand, seven hundred fifty-one".