42555456 has 70 divisors (see below), whose sum is σ = 126163070. Its totient is φ = 14183424.

The previous prime is 42555427. The next prime is 42555473. The reversal of 42555456 is 65455524.

It can be written as a sum of positive squares in only one way, i.e., 26873856 + 15681600 = 5184^2 + 3960^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 42555456.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1080 + ... + 9288.

Almost surely, 2^42555456 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 42555456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63081535).

42555456 is an abundant number, since it is smaller than the sum of its proper divisors (83607614).

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

42555456 is an equidigital number, since it uses as much as digits as its factorization.

42555456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8233 (or 8214 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 42555456 is about 6523.4542996790. The cubic root of 42555456 is about 349.1283234047.

The spelling of 42555456 in words is "forty-two million, five hundred fifty-five thousand, four hundred fifty-six".