42498191 has 4 divisors (see below), whose sum is σ = 43080432. Its totient is φ = 41915952.

The previous prime is 42498187. The next prime is 42498221. The reversal of 42498191 is 19189424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42498191 - 2² = 42498187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42498101) 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, 291011 + ... + 291156.

It is an arithmetic number, because the mean of its divisors is an integer number (10770108).

Almost surely, 2^42498191 is an apocalyptic number.

42498191 is a deficient number, since it is larger than the sum of its proper divisors (582241).

42498191 is an equidigital number, since it uses as much as digits as its factorization.

42498191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582240.

The product of its digits is 20736, while the sum is 38.

The square root of 42498191 is about 6519.0636597597. The cubic root of 42498191 is about 348.9716509130.

It can be divided in two parts, 42498 and 191, that multiplied together give a palindrome (8117118).

The spelling of 42498191 in words is "forty-two million, four hundred ninety-eight thousand, one hundred ninety-one".