42730791 has 24 divisors (see below), whose sum is σ = 61246080. Its totient is φ = 26425872.

The previous prime is 42730783. The next prime is 42730799. The reversal of 42730791 is 19703724.

It is an interprime number because it is at equal distance from previous prime (42730783) and next prime (42730799).

It is not a de Polignac number, because 42730791 - 2³ = 42730783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42730799) 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, 255790 + ... + 255956.

It is an arithmetic number, because the mean of its divisors is an integer number (2551920).

Almost surely, 2^42730791 is an apocalyptic number.

42730791 is a deficient number, since it is larger than the sum of its proper divisors (18515289).

42730791 is a wasteful number, since it uses less digits than its factorization.

42730791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 42730791 is about 6536.8793013180. The cubic root of 42730791 is about 349.6071537852.

The spelling of 42730791 in words is "forty-two million, seven hundred thirty thousand, seven hundred ninety-one".