1195721 has 2 divisors, whose sum is σ = 1195722. Its totient is φ = 1195720.

The previous prime is 1195709. The next prime is 1195723. The reversal of 1195721 is 1275911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 18496 = 1085^2 + 136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1195721 - 2¹⁴ = 1179337 is a prime.

Together with 1195723, 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 (1195723) 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, 597860 + 597861.

It is an arithmetic number, because the mean of its divisors is an integer number (597861).

2^1195721 is an apocalyptic number.

It is an amenable number.

1195721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1195721 is an equidigital number, since it uses as much as digits as its factorization.

1195721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 26.

The square root of 1195721 is about 1093.4902834502. The cubic root of 1195721 is about 106.1393977099.

The spelling of 1195721 in words is "one million, one hundred ninety-five thousand, seven hundred twenty-one".