42195491 has 8 divisors (see below), whose sum is σ = 45697680. Its totient is φ = 38729952.

The previous prime is 42195467. The next prime is 42195499. The reversal of 42195491 is 19459124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42195491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42195499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6740 + ... + 11393.

It is an arithmetic number, because the mean of its divisors is an integer number (5712210).

Almost surely, 2^42195491 is an apocalyptic number.

42195491 is a deficient number, since it is larger than the sum of its proper divisors (3502189).

42195491 is a wasteful number, since it uses less digits than its factorization.

42195491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18325.

The product of its digits is 12960, while the sum is 35.

The square root of 42195491 is about 6495.8056467231. The cubic root of 42195491 is about 348.1411409475.

The spelling of 42195491 in words is "forty-two million, one hundred ninety-five thousand, four hundred ninety-one".