42512133 has 4 divisors (see below), whose sum is σ = 56682848. Its totient is φ = 28341420.

The previous prime is 42512131. The next prime is 42512137. The reversal of 42512133 is 33121524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42512133 - 2¹ = 42512131 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42512131) 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 3 ways as a sum of consecutive naturals, for example, 7085353 + ... + 7085358.

It is an arithmetic number, because the mean of its divisors is an integer number (14170712).

Almost surely, 2^42512133 is an apocalyptic number.

It is an amenable number.

42512133 is a deficient number, since it is larger than the sum of its proper divisors (14170715).

42512133 is a wasteful number, since it uses less digits than its factorization.

42512133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14170714.

The product of its digits is 720, while the sum is 21.

The square root of 42512133 is about 6520.1328974186. The cubic root of 42512133 is about 349.0098080729.

Adding to 42512133 its reverse (33121524), we get a palindrome (75633657).

The spelling of 42512133 in words is "forty-two million, five hundred twelve thousand, one hundred thirty-three".