1247797 has 2 divisors, whose sum is σ = 1247798. Its totient is φ = 1247796.

The previous prime is 1247777. The next prime is 1247801. The reversal of 1247797 is 7977421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 904401 + 343396 = 951^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1247797 - 2¹⁵ = 1215029 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623898 + 623899.

It is an arithmetic number, because the mean of its divisors is an integer number (623899).

2^1247797 is an apocalyptic number.

It is an amenable number.

1247797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247797 is an equidigital number, since it uses as much as digits as its factorization.

1247797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 37.

The square root of 1247797 is about 1117.0483427319. The cubic root of 1247797 is about 107.6584143602.

It can be divided in two parts, 124 and 7797, that added together give a square (7921 = 89²).

The spelling of 1247797 in words is "one million, two hundred forty-seven thousand, seven hundred ninety-seven".