42545000 has 80 divisors (see below), whose sum is σ = 101967360. Its totient is φ = 16632000.

The previous prime is 42544993. The next prime is 42545029. The reversal of 42545000 is 54524.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 334937 + ... + 335063.

It is an arithmetic number, because the mean of its divisors is an integer number (1274592).

Almost surely, 2^42545000 is an apocalyptic number.

42545000 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 42545000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50983680).

42545000 is an abundant number, since it is smaller than the sum of its proper divisors (59422360).

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

42545000 is a wasteful number, since it uses less digits than its factorization.

42545000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 201 counting only the distinct ones).

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

The square root of 42545000 is about 6522.6528345452. The cubic root of 42545000 is about 349.0997271125.

Adding to 42545000 its reverse (54524), we get a palindrome (42599524).

The spelling of 42545000 in words is "forty-two million, five hundred forty-five thousand".