61360261 has 2 divisors, whose sum is σ = 61360262. Its totient is φ = 61360260.

The previous prime is 61360241. The next prime is 61360289. The reversal of 61360261 is 16206316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55204900 + 6155361 = 7430^2 + 2481^2 .

It is a cyclic number.

It is not a de Polignac number, because 61360261 - 2¹⁵ = 61327493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61360241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30680130 + 30680131.

It is an arithmetic number, because the mean of its divisors is an integer number (30680131).

Almost surely, 2^61360261 is an apocalyptic number.

It is an amenable number.

61360261 is a deficient number, since it is larger than the sum of its proper divisors (1).

61360261 is an equidigital number, since it uses as much as digits as its factorization.

61360261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 61360261 is about 7833.2790707340. The cubic root of 61360261 is about 394.4231520140.

Adding to 61360261 its reverse (16206316), we get a palindrome (77566577).

The spelling of 61360261 in words is "sixty-one million, three hundred sixty thousand, two hundred sixty-one".