115121261 has 2 divisors, whose sum is σ = 115121262. Its totient is φ = 115121260.

The previous prime is 115121221. The next prime is 115121267. The reversal of 115121261 is 162121511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97397161 + 17724100 = 9869^2 + 4210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115121261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115121267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57560630 + 57560631.

It is an arithmetic number, because the mean of its divisors is an integer number (57560631).

Almost surely, 2^115121261 is an apocalyptic number.

It is an amenable number.

115121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

115121261 is an equidigital number, since it uses as much as digits as its factorization.

115121261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 20.

The square root of 115121261 is about 10729.4576284172. The cubic root of 115121261 is about 486.4652763924.

Adding to 115121261 its reverse (162121511), we get a palindrome (277242772).

The spelling of 115121261 in words is "one hundred fifteen million, one hundred twenty-one thousand, two hundred sixty-one".