5108921 has 4 divisors (see below), whose sum is σ = 5331072. Its totient is φ = 4886772.

The previous prime is 5108897. The next prime is 5108941. The reversal of 5108921 is 1298015.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1298015 = 5 ⋅259603.

It is a cyclic number.

It is not a de Polignac number, because 5108921 - 2¹⁰ = 5107897 is a prime.

It is a super-2 number, since 2×5108921² = 52202147568482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5108941) 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, 111041 + ... + 111086.

It is an arithmetic number, because the mean of its divisors is an integer number (1332768).

Almost surely, 2^5108921 is an apocalyptic number.

It is an amenable number.

5108921 is a deficient number, since it is larger than the sum of its proper divisors (222151).

5108921 is a wasteful number, since it uses less digits than its factorization.

5108921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222150.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 5108921 is about 2260.2922377427. The cubic root of 5108921 is about 172.2303678114.

The spelling of 5108921 in words is "five million, one hundred eight thousand, nine hundred twenty-one".