43121023 has 8 divisors (see below), whose sum is σ = 47099520. Its totient is φ = 39152280.

The previous prime is 43121011. The next prime is 43121033. The reversal of 43121023 is 32012134.

It is a happy number.

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-43121023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43120988 and 43121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43121033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9286 + ... + 13132.

It is an arithmetic number, because the mean of its divisors is an integer number (5887440).

Almost surely, 2^43121023 is an apocalyptic number.

43121023 is a deficient number, since it is larger than the sum of its proper divisors (3978497).

43121023 is a wasteful number, since it uses less digits than its factorization.

43121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 43121023 is about 6566.6599576954. The cubic root of 43121023 is about 350.6681739387.

Adding to 43121023 its reverse (32012134), we get a palindrome (75133157).

Subtracting from 43121023 its reverse (32012134), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 4312 and 1023, that added together give a palindrome (5335).

The spelling of 43121023 in words is "forty-three million, one hundred twenty-one thousand, twenty-three".