42672309 has 8 divisors (see below), whose sum is σ = 59891040. Its totient is φ = 26950896.

The previous prime is 42672307. The next prime is 42672317. The reversal of 42672309 is 90327624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42672309 - 2¹ = 42672307 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42672309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42672307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374262 + ... + 374375.

It is an arithmetic number, because the mean of its divisors is an integer number (7486380).

Almost surely, 2^42672309 is an apocalyptic number.

It is an amenable number.

42672309 is a deficient number, since it is larger than the sum of its proper divisors (17218731).

42672309 is a wasteful number, since it uses less digits than its factorization.

42672309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748659.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 42672309 is about 6532.4045343197. The cubic root of 42672309 is about 349.4475884411.

The spelling of 42672309 in words is "forty-two million, six hundred seventy-two thousand, three hundred nine".