43134921 has 24 divisors (see below), whose sum is σ = 65975520. Its totient is φ = 27081216.

The previous prime is 43134907. The next prime is 43134929. The reversal of 43134921 is 12943134.

43134921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43134921 - 2⁹ = 43134409 is a prime.

It is a super-3 number, since 3×43134921³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43134929) 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 23 ways as a sum of consecutive naturals, for example, 32350 + ... + 33656.

It is an arithmetic number, because the mean of its divisors is an integer number (2748980).

Almost surely, 2^43134921 is an apocalyptic number.

It is an amenable number.

43134921 is a deficient number, since it is larger than the sum of its proper divisors (22840599).

43134921 is a wasteful number, since it uses less digits than its factorization.

43134921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525 (or 1522 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 43134921 is about 6567.7180968735. The cubic root of 43134921 is about 350.7058435983.

The spelling of 43134921 in words is "forty-three million, one hundred thirty-four thousand, nine hundred twenty-one".