43145137 has 6 divisors (see below), whose sum is σ = 50189298. Its totient is φ = 36981504.

The previous prime is 43145131. The next prime is 43145147. The reversal of 43145137 is 73154134.

43145137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 34000561 + 9144576 = 5831^2 + 3024^2 .

It is not a de Polignac number, because 43145137 - 2⁷ = 43145009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43145131) 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 5 ways as a sum of consecutive naturals, for example, 440208 + ... + 440305.

It is an arithmetic number, because the mean of its divisors is an integer number (8364883).

Almost surely, 2^43145137 is an apocalyptic number.

It is an amenable number.

43145137 is a deficient number, since it is larger than the sum of its proper divisors (7044161).

43145137 is an equidigital number, since it uses as much as digits as its factorization.

43145137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880527 (or 880520 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 43145137 is about 6568.4957943200. The cubic root of 43145137 is about 350.7335282678.

The spelling of 43145137 in words is "forty-three million, one hundred forty-five thousand, one hundred thirty-seven".