42740532 has 72 divisors (see below), whose sum is σ = 115577280. Its totient is φ = 13284480.

The previous prime is 42740527. The next prime is 42740539. The reversal of 42740532 is 23504724.

It is a junction number, because it is equal to n+sod(n) for n = 42740496 and 42740505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42740539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33319 + ... + 34577.

It is an arithmetic number, because the mean of its divisors is an integer number (1605240).

Almost surely, 2^42740532 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 42740532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57788640).

42740532 is an abundant number, since it is smaller than the sum of its proper divisors (72836748).

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

42740532 is a wasteful number, since it uses less digits than its factorization.

42740532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333 (or 1328 counting only the distinct ones).

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

The square root of 42740532 is about 6537.6243391617. The cubic root of 42740532 is about 349.6337174915.

The spelling of 42740532 in words is "forty-two million, seven hundred forty thousand, five hundred thirty-two".