42186369 has 4 divisors (see below), whose sum is σ = 56248496. Its totient is φ = 28124244.

The previous prime is 42186359. The next prime is 42186373. The reversal of 42186369 is 96368124.

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 not a de Polignac number, because 42186369 - 2⁵ = 42186337 is a prime.

It is a super-2 number, since 2×42186369² = 3559379458808322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42186359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7031059 + ... + 7031064.

It is an arithmetic number, because the mean of its divisors is an integer number (14062124).

Almost surely, 2^42186369 is an apocalyptic number.

It is an amenable number.

42186369 is a deficient number, since it is larger than the sum of its proper divisors (14062127).

42186369 is a wasteful number, since it uses less digits than its factorization.

42186369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14062126.

The product of its digits is 62208, while the sum is 39.

The square root of 42186369 is about 6495.1034633792. The cubic root of 42186369 is about 348.1160515972.

The spelling of 42186369 in words is "forty-two million, one hundred eighty-six thousand, three hundred sixty-nine".