1251797 has 2 divisors, whose sum is σ = 1251798. Its totient is φ = 1251796.

The previous prime is 1251791. The next prime is 1251827. The reversal of 1251797 is 7971521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1223236 + 28561 = 1106^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251797 - 2¹⁰ = 1250773 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 (1251791) 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, 625898 + 625899.

It is an arithmetic number, because the mean of its divisors is an integer number (625899).

2^1251797 is an apocalyptic number.

It is an amenable number.

1251797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251797 is an equidigital number, since it uses as much as digits as its factorization.

1251797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 32.

The square root of 1251797 is about 1118.8373429592. The cubic root of 1251797 is about 107.7733300401.

It can be divided in two parts, 1251 and 797, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1251797 in words is "one million, two hundred fifty-one thousand, seven hundred ninety-seven".