42275997 has 12 divisors (see below), whose sum is σ = 63171420. Its totient is φ = 27211968.

The previous prime is 42275929. The next prime is 42276011. The reversal of 42275997 is 79957224.

It can be written as a sum of positive squares in 2 ways, for example, as 21427641 + 20848356 = 4629^2 + 4566^2 .

It is not a de Polignac number, because 42275997 - 2⁷ = 42275869 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42275917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80728 + ... + 81249.

It is an arithmetic number, because the mean of its divisors is an integer number (5264285).

Almost surely, 2^42275997 is an apocalyptic number.

It is an amenable number.

42275997 is a deficient number, since it is larger than the sum of its proper divisors (20895423).

42275997 is a wasteful number, since it uses less digits than its factorization.

42275997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162012 (or 162009 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 42275997 is about 6501.9994617041. Note that the first 3 decimals coincide. The cubic root of 42275997 is about 348.3624098090.

The spelling of 42275997 in words is "forty-two million, two hundred seventy-five thousand, nine hundred ninety-seven".