61000004 has 24 divisors (see below), whose sum is σ = 115747800. Its totient is φ = 27961344.

The previous prime is 61000003. The next prime is 61000039. The reversal of 61000004 is 40000016.

It can be written as a sum of positive squares in 4 ways, for example, as 6240004 + 54760000 = 2498^2 + 7400^2 .

It is not an unprimeable number, because it can be changed into a prime (61000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3812 + ... + 11684.

It is an arithmetic number, because the mean of its divisors is an integer number (4822825).

Almost surely, 2^61000004 is an apocalyptic number.

It is an amenable number.

61000004 is a deficient number, since it is larger than the sum of its proper divisors (54747796).

61000004 is a wasteful number, since it uses less digits than its factorization.

61000004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8039 (or 8037 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 61000004 is about 7810.2499319804. The cubic root of 61000004 is about 393.6497269146.

The spelling of 61000004 in words is "sixty-one million, four", and thus it is an aban number.