1165642241 has 2 divisors, whose sum is σ = 1165642242. Its totient is φ = 1165642240.

The previous prime is 1165642207. The next prime is 1165642297. The reversal of 1165642241 is 1422465611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1084714225 + 80928016 = 32935^2 + 8996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165642241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1165642198 and 1165642207.

It is not a weakly prime, because it can be changed into another prime (1165642141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582821120 + 582821121.

It is an arithmetic number, because the mean of its divisors is an integer number (582821121).

Almost surely, 2^1165642241 is an apocalyptic number.

It is an amenable number.

1165642241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165642241 is an equidigital number, since it uses as much as digits as its factorization.

1165642241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 1165642241 is about 34141.5032035791. The cubic root of 1165642241 is about 1052.4183836224.

The spelling of 1165642241 in words is "one billion, one hundred sixty-five million, six hundred forty-two thousand, two hundred forty-one".