42744081 has 8 divisors (see below), whose sum is σ = 57291264. Its totient is φ = 28346480.

The previous prime is 42744067. The next prime is 42744127. The reversal of 42744081 is 18044724.

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 42744081 - 2⁵ = 42744049 is a prime.

It is a super-2 number, since 2×42744081² = 3654112921069122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42744011) 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, 36726 + ... + 37871.

It is an arithmetic number, because the mean of its divisors is an integer number (7161408).

Almost surely, 2^42744081 is an apocalyptic number.

It is an amenable number.

42744081 is a deficient number, since it is larger than the sum of its proper divisors (14547183).

42744081 is a wasteful number, since it uses less digits than its factorization.

42744081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74791.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 42744081 is about 6537.8957623994. The cubic root of 42744081 is about 349.6433946111.

The spelling of 42744081 in words is "forty-two million, seven hundred forty-four thousand, eighty-one".