43995121 has 2 divisors, whose sum is σ = 43995122. Its totient is φ = 43995120.

The previous prime is 43995101. The next prime is 43995137. The reversal of 43995121 is 12159934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33177600 + 10817521 = 5760^2 + 3289^2 .

It is a cyclic number.

It is not a de Polignac number, because 43995121 - 2⁹ = 43994609 is a prime.

It is not a weakly prime, because it can be changed into another prime (43995101) 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 as a sum of consecutive naturals, namely, 21997560 + 21997561.

It is an arithmetic number, because the mean of its divisors is an integer number (21997561).

Almost surely, 2^43995121 is an apocalyptic number.

It is an amenable number.

43995121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43995121 is an equidigital number, since it uses as much as digits as its factorization.

43995121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 43995121 is about 6632.8818020526. The cubic root of 43995121 is about 353.0217841340.

The spelling of 43995121 in words is "forty-three million, nine hundred ninety-five thousand, one hundred twenty-one".