43000421 has 8 divisors (see below), whose sum is σ = 43513344. Its totient is φ = 42490800.

The previous prime is 43000393. The next prime is 43000453. The reversal of 43000421 is 12400034.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43000421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43000396 and 43000405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43000121) 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, 33035 + ... + 34311.

It is an arithmetic number, because the mean of its divisors is an integer number (5439168).

Almost surely, 2^43000421 is an apocalyptic number.

It is an amenable number.

43000421 is a deficient number, since it is larger than the sum of its proper divisors (512923).

43000421 is a wasteful number, since it uses less digits than its factorization.

43000421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 43000421 is about 6557.4706251725. The cubic root of 43000421 is about 350.3409493920.

Adding to 43000421 its reverse (12400034), we get a palindrome (55400455).

The spelling of 43000421 in words is "forty-three million, four hundred twenty-one", and thus it is an aban number.