42251008 has 36 divisors (see below), whose sum is σ = 84973168. Its totient is φ = 20966400.

The previous prime is 42250997. The next prime is 42251009. The reversal of 42251008 is 80015224.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 42251008.

It is not an unprimeable number, because it can be changed into a prime (42251009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38110 + ... + 39202.

Almost surely, 2^42251008 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 42251008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42486584).

42251008 is an abundant number, since it is smaller than the sum of its proper divisors (42722160).

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

42251008 is a wasteful number, since it uses less digits than its factorization.

42251008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 42251008 is about 6500.0775379991. The cubic root of 42251008 is about 348.2937582129.

The spelling of 42251008 in words is "forty-two million, two hundred fifty-one thousand, eight".