42390167 has 4 divisors (see below), whose sum is σ = 42414240. Its totient is φ = 42366096.

The previous prime is 42390149. The next prime is 42390169. The reversal of 42390167 is 76109324.

42390167 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-42390167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42390169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9167 + ... + 12992.

It is an arithmetic number, because the mean of its divisors is an integer number (10603560).

Almost surely, 2^42390167 is an apocalyptic number.

42390167 is a deficient number, since it is larger than the sum of its proper divisors (24073).

42390167 is a wasteful number, since it uses less digits than its factorization.

42390167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24072.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 42390167 is about 6510.7731491736. The cubic root of 42390167 is about 348.6757222456.

The spelling of 42390167 in words is "forty-two million, three hundred ninety thousand, one hundred sixty-seven".