40512137 has 2 divisors, whose sum is σ = 40512138. Its totient is φ = 40512136.

The previous prime is 40512127. The next prime is 40512169. The reversal of 40512137 is 73121504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35295481 + 5216656 = 5941^2 + 2284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40512137 is a prime.

It is not a weakly prime, because it can be changed into another prime (40512127) 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, 20256068 + 20256069.

It is an arithmetic number, because the mean of its divisors is an integer number (20256069).

Almost surely, 2^40512137 is an apocalyptic number.

It is an amenable number.

40512137 is a deficient number, since it is larger than the sum of its proper divisors (1).

40512137 is an equidigital number, since it uses as much as digits as its factorization.

40512137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 40512137 is about 6364.9145320263. The cubic root of 40512137 is about 343.4485740231.

The spelling of 40512137 in words is "forty million, five hundred twelve thousand, one hundred thirty-seven".