42644117 has 4 divisors (see below), whose sum is σ = 42658560. Its totient is φ = 42629676.

The previous prime is 42644111. The next prime is 42644137. The reversal of 42644117 is 71144624.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42644117 - 2¹⁴ = 42627733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42644117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42644111) 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, 1013 + ... + 9290.

It is an arithmetic number, because the mean of its divisors is an integer number (10664640).

Almost surely, 2^42644117 is an apocalyptic number.

It is an amenable number.

42644117 is a deficient number, since it is larger than the sum of its proper divisors (14443).

42644117 is a wasteful number, since it uses less digits than its factorization.

42644117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14442.

The product of its digits is 5376, while the sum is 29.

The square root of 42644117 is about 6530.2463200097. The cubic root of 42644117 is about 349.3706158331.

The spelling of 42644117 in words is "forty-two million, six hundred forty-four thousand, one hundred seventeen".