42971072 has 28 divisors (see below), whose sum is σ = 85481160. Its totient is φ = 21432576.

The previous prime is 42971059. The next prime is 42971077. The reversal of 42971072 is 27017924.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42971077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44903 + ... + 45849.

Almost surely, 2^42971072 is an apocalyptic number.

It is an amenable number.

42971072 is a deficient number, since it is larger than the sum of its proper divisors (42510088).

42971072 is an equidigital number, since it uses as much as digits as its factorization.

42971072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668 (or 1658 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 42971072 is about 6555.2324138813. The cubic root of 42971072 is about 350.2612253919.

Adding to 42971072 its reverse (27017924), we get a palindrome (69988996).

The spelling of 42971072 in words is "forty-two million, nine hundred seventy-one thousand, seventy-two".