42445100 has 18 divisors (see below), whose sum is σ = 92106084. Its totient is φ = 16978000.

The previous prime is 42445093. The next prime is 42445153. The reversal of 42445100 is 154424.

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 5 ways as a sum of consecutive naturals, for example, 212126 + ... + 212325.

Almost surely, 2^42445100 is an apocalyptic number.

It is an amenable number.

42445100 is an abundant number, since it is smaller than the sum of its proper divisors (49660984).

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

42445100 is a wasteful number, since it uses less digits than its factorization.

42445100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424465 (or 424458 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42445100 is about 6514.9904067466. The cubic root of 42445100 is about 348.8262723772.

Adding to 42445100 its reverse (154424), we get a palindrome (42599524).

The spelling of 42445100 in words is "forty-two million, four hundred forty-five thousand, one hundred".