40254143 has 2 divisors, whose sum is σ = 40254144. Its totient is φ = 40254142.

The previous prime is 40254131. The next prime is 40254157. The reversal of 40254143 is 34145204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40254143 - 2¹² = 40250047 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40254173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20127071 + 20127072.

It is an arithmetic number, because the mean of its divisors is an integer number (20127072).

Almost surely, 2^40254143 is an apocalyptic number.

40254143 is a deficient number, since it is larger than the sum of its proper divisors (1).

40254143 is an equidigital number, since it uses as much as digits as its factorization.

40254143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40254143 is about 6344.6152759643. The cubic root of 40254143 is about 342.7179581295.

Adding to 40254143 its reverse (34145204), we get a palindrome (74399347).

It can be divided in two parts, 402 and 54143, that added together give a palindrome (54545).

The spelling of 40254143 in words is "forty million, two hundred fifty-four thousand, one hundred forty-three".