5109421 has 4 divisors (see below), whose sum is σ = 5193244. Its totient is φ = 5025600.

The previous prime is 5109413. The next prime is 5109431. The reversal of 5109421 is 1249015.

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 741321 + 4368100 = 861^2 + 2090^2 .

It is a cyclic number.

It is not a de Polignac number, because 5109421 - 2³ = 5109413 is a prime.

It is a super-2 number, since 2×5109421² = 52212365910482, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5109392 and 5109401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5109431) 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, 41820 + ... + 41941.

It is an arithmetic number, because the mean of its divisors is an integer number (1298311).

Almost surely, 2^5109421 is an apocalyptic number.

It is an amenable number.

5109421 is a deficient number, since it is larger than the sum of its proper divisors (83823).

5109421 is an equidigital number, since it uses as much as digits as its factorization.

5109421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83822.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 5109421 is about 2260.4028402035. The cubic root of 5109421 is about 172.2359862434.

It can be divided in two parts, 51094 and 21, that added together give a palindrome (51115).

The spelling of 5109421 in words is "five million, one hundred nine thousand, four hundred twenty-one".