42507998 has 8 divisors (see below), whose sum is σ = 68666808. Its totient is φ = 19619064.

The previous prime is 42507991. The next prime is 42508049. The reversal of 42507998 is 89970524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42507991) 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, 817436 + ... + 817487.

It is an arithmetic number, because the mean of its divisors is an integer number (8583351).

Almost surely, 2^42507998 is an apocalyptic number.

42507998 is a deficient number, since it is larger than the sum of its proper divisors (26158810).

42507998 is a wasteful number, since it uses less digits than its factorization.

42507998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634938.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 42507998 is about 6519.8157949439. The cubic root of 42507998 is about 348.9984920694.

The spelling of 42507998 in words is "forty-two million, five hundred seven thousand, nine hundred ninety-eight".