42747144 has 32 divisors (see below), whose sum is σ = 116583840. Its totient is φ = 12953600.

The previous prime is 42747143. The next prime is 42747161. The reversal of 42747144 is 44174724.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (42747143) 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, 80697 + ... + 81224.

It is an arithmetic number, because the mean of its divisors is an integer number (3643245).

Almost surely, 2^42747144 is an apocalyptic number.

42747144 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42747144 is an abundant number, since it is smaller than the sum of its proper divisors (73836696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42747144 is a wasteful number, since it uses less digits than its factorization.

42747144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161941 (or 161937 counting only the distinct ones).

The product of its digits is 25088, while the sum is 33.

The square root of 42747144 is about 6538.1300078845. The cubic root of 42747144 is about 349.6517461155.

The spelling of 42747144 in words is "forty-two million, seven hundred forty-seven thousand, one hundred forty-four".