42609278 has 4 divisors (see below), whose sum is σ = 63913920. Its totient is φ = 21304638.

The previous prime is 42609277. The next prime is 42609289. The reversal of 42609278 is 87290624.

42609278 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 is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42609277) 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 as a sum of consecutive naturals, namely, 10652318 + ... + 10652321.

It is an arithmetic number, because the mean of its divisors is an integer number (15978480).

Almost surely, 2^42609278 is an apocalyptic number.

42609278 is a deficient number, since it is larger than the sum of its proper divisors (21304642).

42609278 is a wasteful number, since it uses less digits than its factorization.

42609278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21304641.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 42609278 is about 6527.5782645634. The cubic root of 42609278 is about 349.2754480437.

The spelling of 42609278 in words is "forty-two million, six hundred nine thousand, two hundred seventy-eight".