1168721 has 2 divisors, whose sum is σ = 1168722. Its totient is φ = 1168720.

The previous prime is 1168711. The next prime is 1168751. The reversal of 1168721 is 1278611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113025 + 55696 = 1055^2 + 236^2 .

It is an emirp because it is prime and its reverse (1278611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1168721 - 2¹⁰ = 1167697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1168711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 584360 + 584361.

It is an arithmetic number, because the mean of its divisors is an integer number (584361).

2^1168721 is an apocalyptic number.

It is an amenable number.

1168721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1168721 is an equidigital number, since it uses as much as digits as its factorization.

1168721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 26.

The square root of 1168721 is about 1081.0740030174. The cubic root of 1168721 is about 105.3344137670.

The spelling of 1168721 in words is "one million, one hundred sixty-eight thousand, seven hundred twenty-one".