42195689 has 4 divisors (see below), whose sum is σ = 42372480. Its totient is φ = 42018900.

The previous prime is 42195677. The next prime is 42195691. The reversal of 42195689 is 98659124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42195689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42191689) 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, 88037 + ... + 88514.

It is an arithmetic number, because the mean of its divisors is an integer number (10593120).

Almost surely, 2^42195689 is an apocalyptic number.

It is an amenable number.

42195689 is a deficient number, since it is larger than the sum of its proper divisors (176791).

42195689 is a wasteful number, since it uses less digits than its factorization.

42195689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176790.

The product of its digits is 155520, while the sum is 44.

The square root of 42195689 is about 6495.8208873090. The cubic root of 42195689 is about 348.1416854909.

The spelling of 42195689 in words is "forty-two million, one hundred ninety-five thousand, six hundred eighty-nine".