42547240 has 64 divisors (see below), whose sum is σ = 101088000. Its totient is φ = 16084992.

The previous prime is 42547237. The next prime is 42547249. The reversal of 42547240 is 4274524.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42547199 and 42547208.

It is not an unprimeable number, because it can be changed into a prime (42547249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94536 + ... + 94984.

It is an arithmetic number, because the mean of its divisors is an integer number (1579500).

Almost surely, 2^42547240 is an apocalyptic number.

42547240 is a gapful number since it is divisible by the number (40) 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 42547240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50544000).

42547240 is an abundant number, since it is smaller than the sum of its proper divisors (58540760).

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

42547240 is a wasteful number, since it uses less digits than its factorization.

42547240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 42547240 is about 6522.8245415617. The cubic root of 42547240 is about 349.1058537209.

The spelling of 42547240 in words is "forty-two million, five hundred forty-seven thousand, two hundred forty".