42131605 has 16 divisors (see below), whose sum is σ = 51710400. Its totient is φ = 32944000.

The previous prime is 42131603. The next prime is 42131623. The reversal of 42131605 is 50613124.

It is not a de Polignac number, because 42131605 - 2¹ = 42131603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131603) 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, 73761 + ... + 74329.

It is an arithmetic number, because the mean of its divisors is an integer number (3231900).

Almost surely, 2^42131605 is an apocalyptic number.

It is an amenable number.

42131605 is a deficient number, since it is larger than the sum of its proper divisors (9578795).

42131605 is a wasteful number, since it uses less digits than its factorization.

42131605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 42131605 is about 6490.8863031176. The cubic root of 42131605 is about 347.9653513969.

Adding to 42131605 its reverse (50613124), we get a palindrome (92744729).

The spelling of 42131605 in words is "forty-two million, one hundred thirty-one thousand, six hundred five".