42644605 has 8 divisors (see below), whose sum is σ = 52363872. Its totient is φ = 33322128.

The previous prime is 42644603. The next prime is 42644611. The reversal of 42644605 is 50644624.

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

It is a cyclic number.

It is not a de Polignac number, because 42644605 - 2¹ = 42644603 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 (42644603) 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, 98959 + ... + 99388.

It is an arithmetic number, because the mean of its divisors is an integer number (6545484).

Almost surely, 2^42644605 is an apocalyptic number.

It is an amenable number.

42644605 is a deficient number, since it is larger than the sum of its proper divisors (9719267).

42644605 is a wasteful number, since it uses less digits than its factorization.

42644605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198395.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 42644605 is about 6530.2836844964. The cubic root of 42644605 is about 349.3719485078.

The spelling of 42644605 in words is "forty-two million, six hundred forty-four thousand, six hundred five".