42661144 has 8 divisors (see below), whose sum is σ = 79989660. Its totient is φ = 21330568.

The previous prime is 42661133. The next prime is 42661147. The reversal of 42661144 is 44116624.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42661147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2666314 + ... + 2666329.

Almost surely, 2^42661144 is an apocalyptic number.

It is an amenable number.

42661144 is a deficient number, since it is larger than the sum of its proper divisors (37328516).

42661144 is a wasteful number, since it uses less digits than its factorization.

42661144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332649 (or 5332645 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 42661144 is about 6531.5498926365. The cubic root of 42661144 is about 349.4171087011.

Adding to 42661144 its reverse (44116624), we get a palindrome (86777768).

The spelling of 42661144 in words is "forty-two million, six hundred sixty-one thousand, one hundred forty-four".