1261697 has 2 divisors, whose sum is σ = 1261698. Its totient is φ = 1261696.

The previous prime is 1261649. The next prime is 1261699. The reversal of 1261697 is 7961621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1032256 + 229441 = 1016^2 + 479^2 .

It is an emirp because it is prime and its reverse (7961621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1261697 - 2¹⁰ = 1260673 is a prime.

Together with 1261699, 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 (1261699) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630848 + 630849.

It is an arithmetic number, because the mean of its divisors is an integer number (630849).

2^1261697 is an apocalyptic number.

It is an amenable number.

1261697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261697 is an equidigital number, since it uses as much as digits as its factorization.

1261697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 1261697 is about 1123.2528655650. The cubic root of 1261697 is about 108.0566974819.

The spelling of 1261697 in words is "one million, two hundred sixty-one thousand, six hundred ninety-seven".