43121045 has 16 divisors (see below), whose sum is σ = 57765312. Its totient is φ = 30629760.

The previous prime is 43121033. The next prime is 43121063. The reversal of 43121045 is 54012134.

It is not a de Polignac number, because 43121045 - 2⁶ = 43120981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6752 + ... + 11481.

It is an arithmetic number, because the mean of its divisors is an integer number (3610332).

Almost surely, 2^43121045 is an apocalyptic number.

It is an amenable number.

43121045 is a deficient number, since it is larger than the sum of its proper divisors (14644267).

43121045 is a wasteful number, since it uses less digits than its factorization.

43121045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18292.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 43121045 is about 6566.6616328238. The cubic root of 43121045 is about 350.6682335747.

Adding to 43121045 its reverse (54012134), we get a palindrome (97133179).

The spelling of 43121045 in words is "forty-three million, one hundred twenty-one thousand, forty-five".