61439841 has 12 divisors (see below), whose sum is σ = 88818132. Its totient is φ = 40926816.

The previous prime is 61439803. The next prime is 61439849. The reversal of 61439841 is 14893416.

61439841 is a `hidden beast` number, since 614 + 39 + 8 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16160400 + 45279441 = 4020^2 + 6729^2 .

It is not a de Polignac number, because 61439841 - 2⁷ = 61439713 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61439796 and 61439805.

It is not an unprimeable number, because it can be changed into a prime (61439849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15075 + ... + 18711.

It is an arithmetic number, because the mean of its divisors is an integer number (7401511).

Almost surely, 2^61439841 is an apocalyptic number.

It is an amenable number.

61439841 is a deficient number, since it is larger than the sum of its proper divisors (27378291).

61439841 is a wasteful number, since it uses less digits than its factorization.

61439841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5520 (or 5517 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 61439841 is about 7838.3570344811. The cubic root of 61439841 is about 394.5935915039.

The spelling of 61439841 in words is "sixty-one million, four hundred thirty-nine thousand, eight hundred forty-one".