4999865 has 24 divisors (see below), whose sum is σ = 6671448. Its totient is φ = 3594240.

The previous prime is 4999849. The next prime is 4999867. The reversal of 4999865 is 5689994.

4999865 = T₃₇₄ + T₃₇₅ + ... + T₄₃₄.

It can be written as a sum of positive squares in 12 ways, for example, as 4280761 + 719104 = 2069^2 + 848^2 .

It is not a de Polignac number, because 4999865 - 2⁴ = 4999849 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4999867) 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 23 ways as a sum of consecutive naturals, for example, 51497 + ... + 51593.

It is an arithmetic number, because the mean of its divisors is an integer number (277977).

Almost surely, 2^4999865 is an apocalyptic number.

It is an amenable number.

4999865 is a deficient number, since it is larger than the sum of its proper divisors (1671583).

4999865 is a wasteful number, since it uses less digits than its factorization.

4999865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 176 counting only the distinct ones).

The product of its digits is 699840, while the sum is 50.

The square root of 4999865 is about 2236.0377903783. The cubic root of 4999865 is about 170.9960556755.

The spelling of 4999865 in words is "four million, nine hundred ninety-nine thousand, eight hundred sixty-five".