13124421 has 48 divisors (see below), whose sum is σ = 21565440. Its totient is φ = 7650720.

The previous prime is 13124399. The next prime is 13124431. The reversal of 13124421 is 12442131.

It is not a de Polignac number, because 13124421 - 2⁵ = 13124389 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13124394 and 13124403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13124431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184816 + ... + 184886.

It is an arithmetic number, because the mean of its divisors is an integer number (449280).

Almost surely, 2^13124421 is an apocalyptic number.

It is an amenable number.

13124421 is a deficient number, since it is larger than the sum of its proper divisors (8441019).

13124421 is a wasteful number, since it uses less digits than its factorization.

13124421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 163 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 13124421 is about 3622.7642760743. The cubic root of 13124421 is about 235.8812303365.

Adding to 13124421 its reverse (12442131), we get a palindrome (25566552).

The spelling of 13124421 in words is "thirteen million, one hundred twenty-four thousand, four hundred twenty-one".