42512137 has 2 divisors, whose sum is σ = 42512138. Its totient is φ = 42512136.

The previous prime is 42512131. The next prime is 42512153. The reversal of 42512137 is 73121524.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34999056 + 7513081 = 5916^2 + 2741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42512137 is a prime.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 21256068 + 21256069.

It is an arithmetic number, because the mean of its divisors is an integer number (21256069).

Almost surely, 2^42512137 is an apocalyptic number.

It is an amenable number.

42512137 is a deficient number, since it is larger than the sum of its proper divisors (1).

42512137 is an equidigital number, since it uses as much as digits as its factorization.

42512137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 42512137 is about 6520.1332041608. The cubic root of 42512137 is about 349.0098190192.

The spelling of 42512137 in words is "forty-two million, five hundred twelve thousand, one hundred thirty-seven".