42722006 has 4 divisors (see below), whose sum is σ = 64083012. Its totient is φ = 21361002.

The previous prime is 42721981. The next prime is 42722027. The reversal of 42722006 is 60022724.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10680500 + ... + 10680503.

It is an arithmetic number, because the mean of its divisors is an integer number (16020753).

Almost surely, 2^42722006 is an apocalyptic number.

42722006 is a deficient number, since it is larger than the sum of its proper divisors (21361006).

42722006 is a wasteful number, since it uses less digits than its factorization.

42722006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21361005.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 42722006 is about 6536.2073100537. The cubic root of 42722006 is about 349.5831936285.

The spelling of 42722006 in words is "forty-two million, seven hundred twenty-two thousand, six".