42435405 has 12 divisors (see below), whose sum is σ = 73554780. Its totient is φ = 22632192.

The previous prime is 42435401. The next prime is 42435431. The reversal of 42435405 is 50453424.

It can be written as a sum of positive squares in 2 ways, for example, as 10929636 + 31505769 = 3306^2 + 5613^2 .

It is not a de Polignac number, because 42435405 - 2² = 42435401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42435401) 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, 471460 + ... + 471549.

It is an arithmetic number, because the mean of its divisors is an integer number (6129565).

Almost surely, 2^42435405 is an apocalyptic number.

42435405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42435405 is a deficient number, since it is larger than the sum of its proper divisors (31119375).

42435405 is a wasteful number, since it uses less digits than its factorization.

42435405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943020 (or 943017 counting only the distinct ones).

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

The square root of 42435405 is about 6514.2463109711. The cubic root of 42435405 is about 348.7997115709.

Adding to 42435405 its reverse (50453424), we get a palindrome (92888829).

The spelling of 42435405 in words is "forty-two million, four hundred thirty-five thousand, four hundred five".