61241261 has 2 divisors, whose sum is σ = 61241262. Its totient is φ = 61241260.

The previous prime is 61241251. The next prime is 61241269. The reversal of 61241261 is 16214216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51122500 + 10118761 = 7150^2 + 3181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61241261 is a prime.

It is a Chen prime.

It is equal to p_3631415 and since 61241261 and 3631415 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61241269) 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, 30620630 + 30620631.

It is an arithmetic number, because the mean of its divisors is an integer number (30620631).

Almost surely, 2^61241261 is an apocalyptic number.

It is an amenable number.

61241261 is a deficient number, since it is larger than the sum of its proper divisors (1).

61241261 is an equidigital number, since it uses as much as digits as its factorization.

61241261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 61241261 is about 7825.6795871030. The cubic root of 61241261 is about 394.1680100632.

Adding to 61241261 its reverse (16214216), we get a palindrome (77455477).

The spelling of 61241261 in words is "sixty-one million, two hundred forty-one thousand, two hundred sixty-one".