42643655 has 8 divisors (see below), whose sum is σ = 51207552. Its totient is φ = 34091488.

The previous prime is 42643637. The next prime is 42643661. The reversal of 42643655 is 55634624.

It is a happy number.

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 42643655 - 2⁶ = 42643591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11882 + ... + 15048.

It is an arithmetic number, because the mean of its divisors is an integer number (6400944).

Almost surely, 2^42643655 is an apocalyptic number.

42643655 is a deficient number, since it is larger than the sum of its proper divisors (8563897).

42643655 is a wasteful number, since it uses less digits than its factorization.

42643655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5865.

The product of its digits is 86400, while the sum is 35.

The square root of 42643655 is about 6530.2109460568. The cubic root of 42643655 is about 349.3693541522.

The spelling of 42643655 in words is "forty-two million, six hundred forty-three thousand, six hundred fifty-five".