61865075 has 6 divisors (see below), whose sum is σ = 76712724. Its totient is φ = 49492040.

The previous prime is 61865051. The next prime is 61865087. The reversal of 61865075 is 57056816.

It is a happy number.

It is not a de Polignac number, because 61865075 - 2¹⁰ = 61864051 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1237277 + ... + 1237326.

It is an arithmetic number, because the mean of its divisors is an integer number (12785454).

Almost surely, 2^61865075 is an apocalyptic number.

61865075 is a deficient number, since it is larger than the sum of its proper divisors (14847649).

61865075 is a wasteful number, since it uses less digits than its factorization.

61865075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474613 (or 2474608 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 61865075 is about 7865.4354615622. The cubic root of 61865075 is about 395.5018457136.

The spelling of 61865075 in words is "sixty-one million, eight hundred sixty-five thousand, seventy-five".