42320145 has 16 divisors (see below), whose sum is σ = 77385600. Its totient is φ = 19346304.

The previous prime is 42320143. The next prime is 42320203. The reversal of 42320145 is 54102324.

It is not a de Polignac number, because 42320145 - 2¹ = 42320143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (42320141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201420 + ... + 201629.

It is an arithmetic number, because the mean of its divisors is an integer number (4836600).

Almost surely, 2^42320145 is an apocalyptic number.

It is an amenable number.

42320145 is a deficient number, since it is larger than the sum of its proper divisors (35065455).

42320145 is a wasteful number, since it uses less digits than its factorization.

42320145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403064.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42320145 is about 6505.3935315244. The cubic root of 42320145 is about 348.4836303152.

Adding to 42320145 its reverse (54102324), we get a palindrome (96422469).

The spelling of 42320145 in words is "forty-two million, three hundred twenty thousand, one hundred forty-five".