261235301 has 2 divisors, whose sum is σ = 261235302. Its totient is φ = 261235300.

The previous prime is 261235267. The next prime is 261235307. The reversal of 261235301 is 103532162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209380900 + 51854401 = 14470^2 + 7201^2 .

It is a cyclic number.

It is not a de Polignac number, because 261235301 - 2¹⁴ = 261218917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261235307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130617650 + 130617651.

It is an arithmetic number, because the mean of its divisors is an integer number (130617651).

Almost surely, 2^261235301 is an apocalyptic number.

It is an amenable number.

261235301 is a deficient number, since it is larger than the sum of its proper divisors (1).

261235301 is an equidigital number, since it uses as much as digits as its factorization.

261235301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 261235301 is about 16162.7751639377. The cubic root of 261235301 is about 639.2596427396.

Adding to 261235301 its reverse (103532162), we get a palindrome (364767463).

The spelling of 261235301 in words is "two hundred sixty-one million, two hundred thirty-five thousand, three hundred one".