42758777 has 4 divisors (see below), whose sum is σ = 43801716. Its totient is φ = 41715840.

The previous prime is 42758761. The next prime is 42758783. The reversal of 42758777 is 77785724.

42758777 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 can be written as a sum of positive squares in 2 ways, for example, as 2105401 + 40653376 = 1451^2 + 6376^2 .

It is a cyclic number.

It is not a de Polignac number, because 42758777 - 2⁴ = 42758761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42758747) 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, 521408 + ... + 521489.

It is an arithmetic number, because the mean of its divisors is an integer number (10950429).

Almost surely, 2^42758777 is an apocalyptic number.

It is an amenable number.

42758777 is a deficient number, since it is larger than the sum of its proper divisors (1042939).

42758777 is a wasteful number, since it uses less digits than its factorization.

42758777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042938.

The product of its digits is 768320, while the sum is 47.

The square root of 42758777 is about 6539.0195748292. The cubic root of 42758777 is about 349.6834607477.

The spelling of 42758777 in words is "forty-two million, seven hundred fifty-eight thousand, seven hundred seventy-seven".