42455000 has 80 divisors (see below), whose sum is σ = 113776080. Its totient is φ = 14544000.

The previous prime is 42454999. The next prime is 42455003. The reversal of 42455000 is 55424.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42455003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34394 + ... + 35606.

It is an arithmetic number, because the mean of its divisors is an integer number (1422201).

Almost surely, 2^42455000 is an apocalyptic number.

42455000 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 42455000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56888040).

42455000 is an abundant number, since it is smaller than the sum of its proper divisors (71321080).

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

42455000 is a wasteful number, since it uses less digits than its factorization.

42455000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 42455000 is about 6515.7501486782. The cubic root of 42455000 is about 348.8533906361.

The spelling of 42455000 in words is "forty-two million, four hundred fifty-five thousand".