5121865 has 16 divisors (see below), whose sum is σ = 7142400. Its totient is φ = 3453120.

The previous prime is 5121841. The next prime is 5121871. The reversal of 5121865 is 5681215.

It is not a de Polignac number, because 5121865 - 2⁵ = 5121833 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 936 + ... + 3334.

It is an arithmetic number, because the mean of its divisors is an integer number (446400).

Almost surely, 2^5121865 is an apocalyptic number.

It is an amenable number.

5121865 is a deficient number, since it is larger than the sum of its proper divisors (2020535).

5121865 is a wasteful number, since it uses less digits than its factorization.

5121865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472.

The product of its digits is 2400, while the sum is 28.

The square root of 5121865 is about 2263.1537729461. The cubic root of 5121865 is about 172.3756998532.

The spelling of 5121865 in words is "five million, one hundred twenty-one thousand, eight hundred sixty-five".