5117921 has 4 divisors (see below), whose sum is σ = 5140500. Its totient is φ = 5095344.

The previous prime is 5117899. The next prime is 5117923. The reversal of 5117921 is 1297115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2927521 + 2190400 = 1711^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 5117921 - 2¹⁰ = 5116897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5117923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10946 + ... + 11403.

It is an arithmetic number, because the mean of its divisors is an integer number (1285125).

Almost surely, 2^5117921 is an apocalyptic number.

It is an amenable number.

5117921 is a deficient number, since it is larger than the sum of its proper divisors (22579).

5117921 is a wasteful number, since it uses less digits than its factorization.

5117921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22578.

The product of its digits is 630, while the sum is 26.

The square root of 5117921 is about 2262.2822547154. The cubic root of 5117921 is about 172.3314435562.

The spelling of 5117921 in words is "five million, one hundred seventeen thousand, nine hundred twenty-one".