115645261 has 2 divisors, whose sum is σ = 115645262. Its totient is φ = 115645260.

The previous prime is 115645259. The next prime is 115645273. The reversal of 115645261 is 162546511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79103236 + 36542025 = 8894^2 + 6045^2 .

It is a cyclic number.

It is not a de Polignac number, because 115645261 - 2¹ = 115645259 is a prime.

Together with 115645259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115645241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57822630 + 57822631.

It is an arithmetic number, because the mean of its divisors is an integer number (57822631).

Almost surely, 2^115645261 is an apocalyptic number.

It is an amenable number.

115645261 is a deficient number, since it is larger than the sum of its proper divisors (1).

115645261 is an equidigital number, since it uses as much as digits as its factorization.

115645261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 115645261 is about 10753.8486598985. The cubic root of 115645261 is about 487.2022442967.

The spelling of 115645261 in words is "one hundred fifteen million, six hundred forty-five thousand, two hundred sixty-one".