42670906 has 4 divisors (see below), whose sum is σ = 64006362. Its totient is φ = 21335452.

The previous prime is 42670897. The next prime is 42670907. The reversal of 42670906 is 60907624.

42670906 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 can be written as a sum of positive squares in only one way, i.e., 33005025 + 9665881 = 5745^2 + 3109^2 .

It is not an unprimeable number, because it can be changed into a prime (42670907) 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, 10667725 + ... + 10667728.

Almost surely, 2^42670906 is an apocalyptic number.

42670906 is a deficient number, since it is larger than the sum of its proper divisors (21335456).

42670906 is a wasteful number, since it uses less digits than its factorization.

42670906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21335455.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 42670906 is about 6532.2971457214. The cubic root of 42670906 is about 349.4437586324.

The spelling of 42670906 in words is "forty-two million, six hundred seventy thousand, nine hundred six".