42779775 has 24 divisors (see below), whose sum is σ = 71391760. Its totient is φ = 22602240.

The previous prime is 42779761. The next prime is 42779809. The reversal of 42779775 is 57797724.

It is not a de Polignac number, because 42779775 - 2¹¹ = 42777727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5559 + ... + 10791.

Almost surely, 2^42779775 is an apocalyptic number.

42779775 is a deficient number, since it is larger than the sum of its proper divisors (28611985).

42779775 is a wasteful number, since it uses less digits than its factorization.

42779775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5355 (or 5350 counting only the distinct ones).

The product of its digits is 864360, while the sum is 48.

The square root of 42779775 is about 6540.6249701386. The cubic root of 42779775 is about 349.7406922855.

The spelling of 42779775 in words is "forty-two million, seven hundred seventy-nine thousand, seven hundred seventy-five".