42531005 has 16 divisors (see below), whose sum is σ = 56865024. Its totient is φ = 30271680.

The previous prime is 42530989. The next prime is 42531017. The reversal of 42531005 is 50013524.

It is not a de Polignac number, because 42531005 - 2⁴ = 42530989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5642 + ... + 10811.

It is an arithmetic number, because the mean of its divisors is an integer number (3554064).

Almost surely, 2^42531005 is an apocalyptic number.

It is an amenable number.

42531005 is a deficient number, since it is larger than the sum of its proper divisors (14334019).

42531005 is a wasteful number, since it uses less digits than its factorization.

42531005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16516.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 42531005 is about 6521.5799466080. The cubic root of 42531005 is about 349.0614446156.

Adding to 42531005 its reverse (50013524), we get a palindrome (92544529).

The spelling of 42531005 in words is "forty-two million, five hundred thirty-one thousand, five".