61841281 has 2 divisors, whose sum is σ = 61841282. Its totient is φ = 61841280.

The previous prime is 61841261. The next prime is 61841287. The reversal of 61841281 is 18214816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61481281 + 360000 = 7841^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 61841281 - 2¹³ = 61833089 is a prime.

It is a super-2 number, since 2×61841281² = 7648688071441922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61841287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30920640 + 30920641.

It is an arithmetic number, because the mean of its divisors is an integer number (30920641).

Almost surely, 2^61841281 is an apocalyptic number.

It is an amenable number.

61841281 is a deficient number, since it is larger than the sum of its proper divisors (1).

61841281 is an equidigital number, since it uses as much as digits as its factorization.

61841281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 31.

The square root of 61841281 is about 7863.9227488576. The cubic root of 61841281 is about 395.4511344001.

The spelling of 61841281 in words is "sixty-one million, eight hundred forty-one thousand, two hundred eighty-one".