42775447 has 16 divisors (see below), whose sum is σ = 50833440. Its totient is φ = 35481600.

The previous prime is 42775433. The next prime is 42775471. The reversal of 42775447 is 74457724.

It is a de Polignac number, because none of the positive numbers 2^k-42775447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42775427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11047 + ... + 14407.

It is an arithmetic number, because the mean of its divisors is an integer number (3177090).

Almost surely, 2^42775447 is an apocalyptic number.

42775447 is a deficient number, since it is larger than the sum of its proper divisors (8057993).

42775447 is a wasteful number, since it uses less digits than its factorization.

42775447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474.

The product of its digits is 219520, while the sum is 40.

The square root of 42775447 is about 6540.2941065368. The cubic root of 42775447 is about 349.7288975471.

The spelling of 42775447 in words is "forty-two million, seven hundred seventy-five thousand, four hundred forty-seven".