5123421 has 6 divisors (see below), whose sum is σ = 7400510. Its totient is φ = 3415608.

The previous prime is 5123399. The next prime is 5123429. The reversal of 5123421 is 1243215.

It can be written as a sum of positive squares in only one way, i.e., 2595321 + 2528100 = 1611^2 + 1590^2 .

It is not a de Polignac number, because 5123421 - 2⁶ = 5123357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5123394 and 5123403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5123429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 284626 + ... + 284643.

Almost surely, 2^5123421 is an apocalyptic number.

It is an amenable number.

5123421 is a deficient number, since it is larger than the sum of its proper divisors (2277089).

5123421 is a wasteful number, since it uses less digits than its factorization.

5123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569275 (or 569272 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 5123421 is about 2263.4975149092. The cubic root of 5123421 is about 172.3931537450.

Adding to 5123421 its reverse (1243215), we get a palindrome (6366636).

The spelling of 5123421 in words is "five million, one hundred twenty-three thousand, four hundred twenty-one".