42765531 has 8 divisors (see below), whose sum is σ = 57194304. Its totient is φ = 28423560.

The previous prime is 42765511. The next prime is 42765539. The reversal of 42765531 is 13556724.

42765531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42765531 - 2⁶ = 42765467 is a prime.

It is a super-2 number, since 2×42765531² = 3657781283423922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42765492 and 42765501.

It is not an unprimeable number, because it can be changed into a prime (42765539) 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 7 ways as a sum of consecutive naturals, for example, 20541 + ... + 22526.

It is an arithmetic number, because the mean of its divisors is an integer number (7149288).

Almost surely, 2^42765531 is an apocalyptic number.

42765531 is a deficient number, since it is larger than the sum of its proper divisors (14428773).

42765531 is a wasteful number, since it uses less digits than its factorization.

42765531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43401.

The product of its digits is 25200, while the sum is 33.

The square root of 42765531 is about 6539.5359927139. The cubic root of 42765531 is about 349.7018712972.

The spelling of 42765531 in words is "forty-two million, seven hundred sixty-five thousand, five hundred thirty-one".