113240261 has 2 divisors, whose sum is σ = 113240262. Its totient is φ = 113240260.

The previous prime is 113240221. The next prime is 113240263. The reversal of 113240261 is 162042311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111724900 + 1515361 = 10570^2 + 1231^2 .

It is a cyclic number.

It is not a de Polignac number, because 113240261 - 2¹⁰ = 113239237 is a prime.

It is a super-2 number, since 2×113240261² = 25646713422696242, which contains 22 as substring.

Together with 113240263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113240263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56620130 + 56620131.

It is an arithmetic number, because the mean of its divisors is an integer number (56620131).

Almost surely, 2^113240261 is an apocalyptic number.

It is an amenable number.

113240261 is a deficient number, since it is larger than the sum of its proper divisors (1).

113240261 is an equidigital number, since it uses as much as digits as its factorization.

113240261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 113240261 is about 10641.4407389225. The cubic root of 113240261 is about 483.8012141003.

Adding to 113240261 its reverse (162042311), we get a palindrome (275282572).

The spelling of 113240261 in words is "one hundred thirteen million, two hundred forty thousand, two hundred sixty-one".