42420528 has 60 divisors (see below), whose sum is σ = 120754920. Its totient is φ = 13897728.

The previous prime is 42420509. The next prime is 42420529. The reversal of 42420528 is 82502424.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (42420529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6000 + ... + 10992.

It is an arithmetic number, because the mean of its divisors is an integer number (2012582).

Almost surely, 2^42420528 is an apocalyptic number.

42420528 is a gapful number since it is divisible by the number (48) 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 42420528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60377460).

42420528 is an abundant number, since it is smaller than the sum of its proper divisors (78334392).

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

42420528 is a wasteful number, since it uses less digits than its factorization.

42420528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066 (or 5057 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 42420528 is about 6513.1043289663. The cubic root of 42420528 is about 348.7589460842.

The spelling of 42420528 in words is "forty-two million, four hundred twenty thousand, five hundred twenty-eight".