42547720 has 16 divisors (see below), whose sum is σ = 95732460. Its totient is φ = 17019072.

The previous prime is 42547693. The next prime is 42547721. The reversal of 42547720 is 2774524.

It can be written as a sum of positive squares in 2 ways, for example, as 42536484 + 11236 = 6522^2 + 106^2 .

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (42547721) 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, 531807 + ... + 531886.

Almost surely, 2^42547720 is an apocalyptic number.

42547720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42547720 is an abundant number, since it is smaller than the sum of its proper divisors (53184740).

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

42547720 is a wasteful number, since it uses less digits than its factorization.

42547720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063704 (or 1063700 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 42547720 is about 6522.8613353344. The cubic root of 42547720 is about 349.1071665376.

The spelling of 42547720 in words is "forty-two million, five hundred forty-seven thousand, seven hundred twenty".