43642645 has 16 divisors (see below), whose sum is σ = 53569152. Its totient is φ = 34125120.

The previous prime is 43642631. The next prime is 43642657. The reversal of 43642645 is 54624634.

It is not a de Polignac number, because 43642645 - 2¹⁵ = 43609877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43642645.

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, 42235 + ... + 43255.

It is an arithmetic number, because the mean of its divisors is an integer number (3348072).

Almost surely, 2^43642645 is an apocalyptic number.

It is an amenable number.

43642645 is a deficient number, since it is larger than the sum of its proper divisors (9926507).

43642645 is a wasteful number, since it uses less digits than its factorization.

43642645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

The product of its digits is 69120, while the sum is 34.

The square root of 43642645 is about 6606.2580179705. The cubic root of 43642645 is about 352.0764861554.

The spelling of 43642645 in words is "forty-three million, six hundred forty-two thousand, six hundred forty-five".