61236641 has 2 divisors, whose sum is σ = 61236642. Its totient is φ = 61236640.

The previous prime is 61236611. The next prime is 61236647. The reversal of 61236641 is 14663216.

It is a happy number.

61236641 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., 35521600 + 25715041 = 5960^2 + 5071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61236641 is a prime.

It is not a weakly prime, because it can be changed into another prime (61236647) 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, 30618320 + 30618321.

It is an arithmetic number, because the mean of its divisors is an integer number (30618321).

Almost surely, 2^61236641 is an apocalyptic number.

It is an amenable number.

61236641 is a deficient number, since it is larger than the sum of its proper divisors (1).

61236641 is an equidigital number, since it uses as much as digits as its factorization.

61236641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 61236641 is about 7825.3843995040. The cubic root of 61236641 is about 394.1580978897.

Adding to 61236641 its reverse (14663216), we get a palindrome (75899857).

The spelling of 61236641 in words is "sixty-one million, two hundred thirty-six thousand, six hundred forty-one".