42534072 has 80 divisors (see below), whose sum is σ = 136168560. Its totient is φ = 12151296.

The previous prime is 42534071. The next prime is 42534091. The reversal of 42534072 is 27043524.

42534072 is a `hidden beast` number, since 4 + 253 + 407 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42534071) 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, 153 + ... + 9224.

It is an arithmetic number, because the mean of its divisors is an integer number (1702107).

Almost surely, 2^42534072 is an apocalyptic number.

42534072 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42534072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68084280).

42534072 is an abundant number, since it is smaller than the sum of its proper divisors (93634488).

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

42534072 is a wasteful number, since it uses less digits than its factorization.

42534072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9402 (or 9389 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 42534072 is about 6521.8150847751. The cubic root of 42534072 is about 349.0698349316.

Adding to 42534072 its reverse (27043524), we get a palindrome (69577596).

The spelling of 42534072 in words is "forty-two million, five hundred thirty-four thousand, seventy-two".