42124405 has 8 divisors (see below), whose sum is σ = 50668632. Its totient is φ = 33619968.

The previous prime is 42124403. The next prime is 42124451. The reversal of 42124405 is 50442124.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2961841 + 39162564 = 1721^2 + 6258^2 .

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 42124405 - 2¹ = 42124403 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 (42124403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7564 + ... + 11893.

It is an arithmetic number, because the mean of its divisors is an integer number (6333579).

Almost surely, 2^42124405 is an apocalyptic number.

It is an amenable number.

42124405 is a deficient number, since it is larger than the sum of its proper divisors (8544227).

42124405 is a wasteful number, since it uses less digits than its factorization.

42124405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19895.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 42124405 is about 6490.3316556244. The cubic root of 42124405 is about 347.9455286434.

Adding to 42124405 its reverse (50442124), we get a palindrome (92566529).

The spelling of 42124405 in words is "forty-two million, one hundred twenty-four thousand, four hundred five".