42000531 has 8 divisors (see below), whose sum is σ = 56180880. Its totient is φ = 27910272.

The previous prime is 42000529. The next prime is 42000559. The reversal of 42000531 is 13500024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42000531 - 2¹ = 42000529 is a prime.

It is a super-2 number, since 2×42000531² = 3528089208563922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42000531.

It is not an unprimeable number, because it can be changed into a prime (42000521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21426 + ... + 23303.

It is an arithmetic number, because the mean of its divisors is an integer number (7022610).

Almost surely, 2^42000531 is an apocalyptic number.

42000531 is a deficient number, since it is larger than the sum of its proper divisors (14180349).

42000531 is a wasteful number, since it uses less digits than its factorization.

42000531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45045.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 42000531 is about 6480.7816658178. The cubic root of 42000531 is about 347.6041293794.

Adding to 42000531 its reverse (13500024), we get a palindrome (55500555).

The spelling of 42000531 in words is "forty-two million, five hundred thirty-one", and thus it is an aban number.