61125647 has 4 divisors (see below), whose sum is σ = 66682536. Its totient is φ = 55568760.

The previous prime is 61125637. The next prime is 61125703. The reversal of 61125647 is 74652116.

61125647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61125647 - 2²⁰ = 60077071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61125607) 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 3 ways as a sum of consecutive naturals, for example, 2778428 + ... + 2778449.

It is an arithmetic number, because the mean of its divisors is an integer number (16670634).

Almost surely, 2^61125647 is an apocalyptic number.

61125647 is a deficient number, since it is larger than the sum of its proper divisors (5556889).

61125647 is a wasteful number, since it uses less digits than its factorization.

61125647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556888.

The product of its digits is 10080, while the sum is 32.

The square root of 61125647 is about 7818.2892630038. The cubic root of 61125647 is about 393.9198111262.

The spelling of 61125647 in words is "sixty-one million, one hundred twenty-five thousand, six hundred forty-seven".