42768591 has 8 divisors (see below), whose sum is σ = 58991280. Its totient is φ = 27529152.

The previous prime is 42768521. The next prime is 42768599. The reversal of 42768591 is 19586724.

42768591 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 42768591 - 2⁷ = 42768463 is a prime.

It is a super-2 number, since 2×42768591² = 3658304752250562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42768599) 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, 245710 + ... + 245883.

It is an arithmetic number, because the mean of its divisors is an integer number (7373910).

Almost surely, 2^42768591 is an apocalyptic number.

42768591 is a deficient number, since it is larger than the sum of its proper divisors (16222689).

42768591 is a wasteful number, since it uses less digits than its factorization.

42768591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491625.

The product of its digits is 120960, while the sum is 42.

The square root of 42768591 is about 6539.7699500823. The cubic root of 42768591 is about 349.7102118321.

The spelling of 42768591 in words is "forty-two million, seven hundred sixty-eight thousand, five hundred ninety-one".