43742745 has 24 divisors (see below), whose sum is σ = 76894272. Its totient is φ = 22999200.

The previous prime is 43742729. The next prime is 43742747. The reversal of 43742745 is 54724734.

It is not a de Polignac number, because 43742745 - 2⁴ = 43742729 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (43742747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3651 + ... + 10040.

It is an arithmetic number, because the mean of its divisors is an integer number (3203928).

Almost surely, 2^43742745 is an apocalyptic number.

43742745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43742745 is a deficient number, since it is larger than the sum of its proper divisors (33151527).

43742745 is a wasteful number, since it uses less digits than its factorization.

43742745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13773 (or 13770 counting only the distinct ones).

The product of its digits is 94080, while the sum is 36.

The square root of 43742745 is about 6613.8298284731. The cubic root of 43742745 is about 352.3454581352.

The spelling of 43742745 in words is "forty-three million, seven hundred forty-two thousand, seven hundred forty-five".