42320091 has 8 divisors (see below), whose sum is σ = 61556544. Its totient is φ = 25648520.

The previous prime is 42320029. The next prime is 42320093. The reversal of 42320091 is 19002324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42320091 - 2¹¹ = 42318043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42320093) 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, 641181 + ... + 641246.

It is an arithmetic number, because the mean of its divisors is an integer number (7694568).

Almost surely, 2^42320091 is an apocalyptic number.

42320091 is a deficient number, since it is larger than the sum of its proper divisors (19236453).

42320091 is a wasteful number, since it uses less digits than its factorization.

42320091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282441.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 42320091 is about 6505.3893811209. The cubic root of 42320091 is about 348.4834820948.

The spelling of 42320091 in words is "forty-two million, three hundred twenty thousand, ninety-one".