42725420 has 48 divisors (see below), whose sum is σ = 96834528. Its totient is φ = 15774720.

The previous prime is 42725401. The next prime is 42725453. The reversal of 42725420 is 2452724.

It is a self number, because there is not a number n which added to its sum of digits gives 42725420.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16835 + ... + 19205.

It is an arithmetic number, because the mean of its divisors is an integer number (2017386).

Almost surely, 2^42725420 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 42725420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48417264).

42725420 is an abundant number, since it is smaller than the sum of its proper divisors (54109108).

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

42725420 is a wasteful number, since it uses less digits than its factorization.

42725420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450 (or 2448 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 42725420 is about 6536.4684654636. The cubic root of 42725420 is about 349.5925053420.

The spelling of 42725420 in words is "forty-two million, seven hundred twenty-five thousand, four hundred twenty".