42290747 has 4 divisors (see below), whose sum is σ = 44778456. Its totient is φ = 39803040.

The previous prime is 42290723. The next prime is 42290761. The reversal of 42290747 is 74709224.

It is a happy number.

42290747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42290747 - 2⁶ = 42290683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42290707) 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 3 ways as a sum of consecutive naturals, for example, 1243829 + ... + 1243862.

It is an arithmetic number, because the mean of its divisors is an integer number (11194614).

Almost surely, 2^42290747 is an apocalyptic number.

42290747 is a deficient number, since it is larger than the sum of its proper divisors (2487709).

42290747 is a wasteful number, since it uses less digits than its factorization.

42290747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487708.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 42290747 is about 6503.1336292591. The cubic root of 42290747 is about 348.4029193845.

The spelling of 42290747 in words is "forty-two million, two hundred ninety thousand, seven hundred forty-seven".