42765031 has 2 divisors, whose sum is σ = 42765032. Its totient is φ = 42765030.

The previous prime is 42765017. The next prime is 42765043. The reversal of 42765031 is 13056724.

42765031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42765031 - 2⁵ = 42764999 is a prime.

It is a super-2 number, since 2×42765031² = 3657695752861922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42765001) 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 as a sum of consecutive naturals, namely, 21382515 + 21382516.

It is an arithmetic number, because the mean of its divisors is an integer number (21382516).

Almost surely, 2^42765031 is an apocalyptic number.

42765031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42765031 is an equidigital number, since it uses as much as digits as its factorization.

42765031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 42765031 is about 6539.4977635901. The cubic root of 42765031 is about 349.7005084269.

The spelling of 42765031 in words is "forty-two million, seven hundred sixty-five thousand, thirty-one".