42971472 has 100 divisors (see below), whose sum is σ = 126393696. Its totient is φ = 14091840.

The previous prime is 42971471. The next prime is 42971477. The reversal of 42971472 is 27417924.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42971471) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 91783 + ... + 92249.

Almost surely, 2^42971472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42971472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63196848).

42971472 is an abundant number, since it is smaller than the sum of its proper divisors (83422224).

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

42971472 is a wasteful number, since it uses less digits than its factorization.

42971472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 543 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 42971472 is about 6555.2629237888. The cubic root of 42971472 is about 350.2623122010.

The spelling of 42971472 in words is "forty-two million, nine hundred seventy-one thousand, four hundred seventy-two".