61240705 has 16 divisors (see below), whose sum is σ = 78822720. Its totient is φ = 45534528.

The previous prime is 61240703. The next prime is 61240709. The reversal of 61240705 is 50704216.

61240705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61240705 - 2¹ = 61240703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61240705.

It is not an unprimeable number, because it can be changed into a prime (61240703) 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 in 15 ways as a sum of consecutive naturals, for example, 1047 + ... + 11116.

It is an arithmetic number, because the mean of its divisors is an integer number (4926420).

Almost surely, 2^61240705 is an apocalyptic number.

It is an amenable number.

61240705 is a deficient number, since it is larger than the sum of its proper divisors (17582015).

61240705 is a wasteful number, since it uses less digits than its factorization.

61240705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12240.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 61240705 is about 7825.6440629510. The cubic root of 61240705 is about 394.1668171959.

The spelling of 61240705 in words is "sixty-one million, two hundred forty thousand, seven hundred five".