42180667 has 4 divisors (see below), whose sum is σ = 43078176. Its totient is φ = 41283160.

The previous prime is 42180661. The next prime is 42180679. The reversal of 42180667 is 76608124.

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

It is a cyclic number.

It is not a de Polignac number, because 42180667 - 2³ = 42180659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42180661) 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, 448684 + ... + 448777.

It is an arithmetic number, because the mean of its divisors is an integer number (10769544).

Almost surely, 2^42180667 is an apocalyptic number.

42180667 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

42180667 is a deficient number, since it is larger than the sum of its proper divisors (897509).

42180667 is an equidigital number, since it uses as much as digits as its factorization.

42180667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897508.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 42180667 is about 6494.6645024974. The cubic root of 42180667 is about 348.1003668534.

The spelling of 42180667 in words is "forty-two million, one hundred eighty thousand, six hundred sixty-seven".