42171744 has 24 divisors (see below), whose sum is σ = 110701080. Its totient is φ = 14057216.

The previous prime is 42171721. The next prime is 42171761. The reversal of 42171744 is 44717124.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219549 + ... + 219740.

It is an arithmetic number, because the mean of its divisors is an integer number (4612545).

Almost surely, 2^42171744 is an apocalyptic number.

It is an amenable number.

42171744 is an abundant number, since it is smaller than the sum of its proper divisors (68529336).

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

42171744 is a wasteful number, since it uses less digits than its factorization.

42171744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439302 (or 439294 counting only the distinct ones).

The product of its digits is 6272, while the sum is 30.

The square root of 42171744 is about 6493.9775176697. The cubic root of 42171744 is about 348.0758191254.

Adding to 42171744 its reverse (44717124), we get a palindrome (86888868).

The spelling of 42171744 in words is "forty-two million, one hundred seventy-one thousand, seven hundred forty-four".