43130421 has 8 divisors (see below), whose sum is σ = 63896960. Its totient is φ = 28753596.

The previous prime is 43130387. The next prime is 43130429. The reversal of 43130421 is 12403134.

It is not a de Polignac number, because 43130421 - 2¹⁰ = 43129397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43130394 and 43130403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43130429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 798685 + ... + 798738.

It is an arithmetic number, because the mean of its divisors is an integer number (7987120).

Almost surely, 2^43130421 is an apocalyptic number.

It is an amenable number.

43130421 is a deficient number, since it is larger than the sum of its proper divisors (20766539).

43130421 is a wasteful number, since it uses less digits than its factorization.

43130421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597432 (or 1597426 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 43130421 is about 6567.3755031976. The cubic root of 43130421 is about 350.6936475157.

Adding to 43130421 its reverse (12403134), we get a palindrome (55533555).

The spelling of 43130421 in words is "forty-three million, one hundred thirty thousand, four hundred twenty-one".