43134021 has 48 divisors (see below), whose sum is σ = 73696896. Its totient is φ = 23804928.

The previous prime is 43134019. The next prime is 43134029. The reversal of 43134021 is 12043134.

It is not a de Polignac number, because 43134021 - 2¹ = 43134019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43133985 and 43134003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43134029) 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, 381661 + ... + 381773.

It is an arithmetic number, because the mean of its divisors is an integer number (1535352).

Almost surely, 2^43134021 is an apocalyptic number.

It is an amenable number.

43134021 is a deficient number, since it is larger than the sum of its proper divisors (30562875).

43134021 is a wasteful number, since it uses less digits than its factorization.

43134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 279 counting only the distinct ones).

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

The square root of 43134021 is about 6567.6495795680. The cubic root of 43134021 is about 350.7034044497.

Adding to 43134021 its reverse (12043134), we get a palindrome (55177155).

The spelling of 43134021 in words is "forty-three million, one hundred thirty-four thousand, twenty-one".