42647422 has 4 divisors (see below), whose sum is σ = 63971136. Its totient is φ = 21323710.

The previous prime is 42647417. The next prime is 42647447. The reversal of 42647422 is 22474624.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661854 + ... + 10661857.

It is an arithmetic number, because the mean of its divisors is an integer number (15992784).

Almost surely, 2^42647422 is an apocalyptic number.

42647422 is a deficient number, since it is larger than the sum of its proper divisors (21323714).

42647422 is a wasteful number, since it uses less digits than its factorization.

42647422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21323713.

The product of its digits is 21504, while the sum is 31.

The square root of 42647422 is about 6530.4993683485. The cubic root of 42647422 is about 349.3796412285.

The spelling of 42647422 in words is "forty-two million, six hundred forty-seven thousand, four hundred twenty-two".