42663745 has 8 divisors (see below), whose sum is σ = 51600384. Its totient is φ = 33861744.

The previous prime is 42663737. The next prime is 42663749. The reversal of 42663745 is 54736624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42663745 - 2³ = 42663737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42663749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32959 + ... + 34228.

It is an arithmetic number, because the mean of its divisors is an integer number (6450048).

Almost surely, 2^42663745 is an apocalyptic number.

It is an amenable number.

42663745 is a deficient number, since it is larger than the sum of its proper divisors (8936639).

42663745 is a wasteful number, since it uses less digits than its factorization.

42663745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67319.

The product of its digits is 120960, while the sum is 37.

The square root of 42663745 is about 6531.7490000765. The cubic root of 42663745 is about 349.4242097408.

The spelling of 42663745 in words is "forty-two million, six hundred sixty-three thousand, seven hundred forty-five".