42891206 has 4 divisors (see below), whose sum is σ = 64336812. Its totient is φ = 21445602.

The previous prime is 42891181. The next prime is 42891209. The reversal of 42891206 is 60219824.

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 (42891209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10722800 + ... + 10722803.

It is an arithmetic number, because the mean of its divisors is an integer number (16084203).

Almost surely, 2^42891206 is an apocalyptic number.

42891206 is a deficient number, since it is larger than the sum of its proper divisors (21445606).

42891206 is a wasteful number, since it uses less digits than its factorization.

42891206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21445605.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 42891206 is about 6549.1378058490. The cubic root of 42891206 is about 350.0440924043.

The spelling of 42891206 in words is "forty-two million, eight hundred ninety-one thousand, two hundred six".