42639395 has 8 divisors (see below), whose sum is σ = 51304560. Its totient is φ = 34020000.

The previous prime is 42639391. The next prime is 42639397. The reversal of 42639395 is 59393624.

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

It is not a de Polignac number, because 42639395 - 2² = 42639391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42639391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9356 + ... + 13145.

It is an arithmetic number, because the mean of its divisors is an integer number (6413070).

Almost surely, 2^42639395 is an apocalyptic number.

42639395 is a deficient number, since it is larger than the sum of its proper divisors (8665165).

42639395 is a wasteful number, since it uses less digits than its factorization.

42639395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22885.

The product of its digits is 174960, while the sum is 41.

The square root of 42639395 is about 6529.8847616172. The cubic root of 42639395 is about 349.3577200415.

It can be divided in two parts, 42639 and 395, that added together give a palindrome (43034).

The spelling of 42639395 in words is "forty-two million, six hundred thirty-nine thousand, three hundred ninety-five".