42250240 has 52 divisors (see below), whose sum is σ = 101437344. Its totient is φ = 16891904.

The previous prime is 42250231. The next prime is 42250277. The reversal of 42250240 is 4205224.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19449 + ... + 21511.

Almost surely, 2^42250240 is an apocalyptic number.

42250240 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 42250240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50718672).

42250240 is an abundant number, since it is smaller than the sum of its proper divisors (59187104).

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

42250240 is an equidigital number, since it uses as much as digits as its factorization.

42250240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092 (or 2070 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42250240 is about 6500.0184615122. The cubic root of 42250240 is about 348.2916478788.

Adding to 42250240 its reverse (4205224), we get a palindrome (46455464).

The spelling of 42250240 in words is "forty-two million, two hundred fifty thousand, two hundred forty".