42169691 has 4 divisors (see below), whose sum is σ = 42747432. Its totient is φ = 41591952.

The previous prime is 42169667. The next prime is 42169693. The reversal of 42169691 is 19696124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42169691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42169693) 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, 288761 + ... + 288906.

It is an arithmetic number, because the mean of its divisors is an integer number (10686858).

Almost surely, 2^42169691 is an apocalyptic number.

42169691 is a deficient number, since it is larger than the sum of its proper divisors (577741).

42169691 is an equidigital number, since it uses as much as digits as its factorization.

42169691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577740.

The product of its digits is 23328, while the sum is 38.

The square root of 42169691 is about 6493.8194462119. The cubic root of 42169691 is about 348.0701707047.

The spelling of 42169691 in words is "forty-two million, one hundred sixty-nine thousand, six hundred ninety-one".