42261663 has 8 divisors (see below), whose sum is σ = 56793088. Its totient is φ = 27952344.

The previous prime is 42261631. The next prime is 42261673. The reversal of 42261663 is 36616224.

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

It is not a de Polignac number, because 42261663 - 2⁵ = 42261631 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 42261663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42261673) 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, 55081 + ... + 55842.

It is an arithmetic number, because the mean of its divisors is an integer number (7099136).

Almost surely, 2^42261663 is an apocalyptic number.

42261663 is a deficient number, since it is larger than the sum of its proper divisors (14531425).

42261663 is a wasteful number, since it uses less digits than its factorization.

42261663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111053.

The product of its digits is 10368, while the sum is 30.

The square root of 42261663 is about 6500.8970919405. The cubic root of 42261663 is about 348.3230337123.

Adding to 42261663 its reverse (36616224), we get a palindrome (78877887).

It can be divided in two parts, 42261 and 663, that added together give a palindrome (42924).

The spelling of 42261663 in words is "forty-two million, two hundred sixty-one thousand, six hundred sixty-three".