40643141 has 32 divisors (see below), whose sum is σ = 54639360. Its totient is φ = 29260800.

The previous prime is 40643137. The next prime is 40643171. The reversal of 40643141 is 14134604.

It is a cyclic number.

It is not a de Polignac number, because 40643141 - 2² = 40643137 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40643111) 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 31 ways as a sum of consecutive naturals, for example, 79595 + ... + 80103.

It is an arithmetic number, because the mean of its divisors is an integer number (1707480).

Almost surely, 2^40643141 is an apocalyptic number.

It is an amenable number.

40643141 is a deficient number, since it is larger than the sum of its proper divisors (13996219).

40643141 is a wasteful number, since it uses less digits than its factorization.

40643141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40643141 is about 6375.1973302793. The cubic root of 40643141 is about 343.8183786397.

Adding to 40643141 its reverse (14134604), we get a palindrome (54777745).

The spelling of 40643141 in words is "forty million, six hundred forty-three thousand, one hundred forty-one".