42206407 has 4 divisors (see below), whose sum is σ = 43567936. Its totient is φ = 40844880.

The previous prime is 42206401. The next prime is 42206419. The reversal of 42206407 is 70460224.

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

It is a cyclic number.

It is not a de Polignac number, because 42206407 - 2³ = 42206399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42206401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680718 + ... + 680779.

It is an arithmetic number, because the mean of its divisors is an integer number (10891984).

Almost surely, 2^42206407 is an apocalyptic number.

42206407 is a deficient number, since it is larger than the sum of its proper divisors (1361529).

42206407 is a wasteful number, since it uses less digits than its factorization.

42206407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361528.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 42206407 is about 6496.6458268864. The cubic root of 42206407 is about 348.1711598029.

The spelling of 42206407 in words is "forty-two million, two hundred six thousand, four hundred seven".