42405345 has 12 divisors (see below), whose sum is σ = 73502676. Its totient is φ = 22616160.

The previous prime is 42405329. The next prime is 42405347. The reversal of 42405345 is 54350424.

It can be written as a sum of positive squares in 2 ways, for example, as 5645376 + 36759969 = 2376^2 + 6063^2 .

It is not a de Polignac number, because 42405345 - 2⁴ = 42405329 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42405347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 471126 + ... + 471215.

It is an arithmetic number, because the mean of its divisors is an integer number (6125223).

Almost surely, 2^42405345 is an apocalyptic number.

42405345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42405345 is a deficient number, since it is larger than the sum of its proper divisors (31097331).

42405345 is a wasteful number, since it uses less digits than its factorization.

42405345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942352 (or 942349 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 42405345 is about 6511.9386514309. The cubic root of 42405345 is about 348.7173322775.

Adding to 42405345 its reverse (54350424), we get a palindrome (96755769).

The spelling of 42405345 in words is "forty-two million, four hundred five thousand, three hundred forty-five".