42347520 has 132 divisors (see below), whose sum is σ = 146892720. Its totient is φ = 11280384.

The previous prime is 42347509. The next prime is 42347521. The reversal of 42347520 is 2574324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42347521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45621 + ... + 46539.

Almost surely, 2^42347520 is an apocalyptic number.

42347520 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 42347520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73446360).

42347520 is an abundant number, since it is smaller than the sum of its proper divisors (104545200).

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

42347520 is a wasteful number, since it uses less digits than its factorization.

42347520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950 (or 929 counting only the distinct ones).

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

The square root of 42347520 is about 6507.4972147516. The cubic root of 42347520 is about 348.5587535863.

The spelling of 42347520 in words is "forty-two million, three hundred forty-seven thousand, five hundred twenty".