42191369 has 8 divisors (see below), whose sum is σ = 46408800. Its totient is φ = 38354580.

The previous prime is 42191353. The next prime is 42191371. The reversal of 42191369 is 96319124.

It is not a de Polignac number, because 42191369 - 2⁴ = 42191353 is a prime.

It is a super-2 number, since 2×42191369² = 3560223236188322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42191309) 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, 14519 + ... + 17180.

It is an arithmetic number, because the mean of its divisors is an integer number (5801100).

Almost surely, 2^42191369 is an apocalyptic number.

It is an amenable number.

42191369 is a deficient number, since it is larger than the sum of its proper divisors (4217431).

42191369 is an equidigital number, since it uses as much as digits as its factorization.

42191369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31732 (or 31710 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 42191369 is about 6495.4883573139. The cubic root of 42191369 is about 348.1298041555.

The spelling of 42191369 in words is "forty-two million, one hundred ninety-one thousand, three hundred sixty-nine".