61262161 has 2 divisors, whose sum is σ = 61262162. Its totient is φ = 61262160.

The previous prime is 61262063. The next prime is 61262167. The reversal of 61262161 is 16126216.

61262161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35820225 + 25441936 = 5985^2 + 5044^2 .

It is a cyclic number.

It is not a de Polignac number, because 61262161 - 2⁹ = 61261649 is a prime.

It is not a weakly prime, because it can be changed into another prime (61262167) 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, 30631080 + 30631081.

It is an arithmetic number, because the mean of its divisors is an integer number (30631081).

Almost surely, 2^61262161 is an apocalyptic number.

It is an amenable number.

61262161 is a deficient number, since it is larger than the sum of its proper divisors (1).

61262161 is an equidigital number, since it uses as much as digits as its factorization.

61262161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 61262161 is about 7827.0148204791. The cubic root of 61262161 is about 394.2128446203.

Adding to 61262161 its reverse (16126216), we get a palindrome (77388377).

The spelling of 61262161 in words is "sixty-one million, two hundred sixty-two thousand, one hundred sixty-one".