40605143 has 8 divisors (see below), whose sum is σ = 42558048. Its totient is φ = 38667904.

The previous prime is 40605119. The next prime is 40605151. The reversal of 40605143 is 34150604.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40605143 - 2⁸ = 40604887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40605193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571 + ... + 9147.

It is an arithmetic number, because the mean of its divisors is an integer number (5319756).

Almost surely, 2^40605143 is an apocalyptic number.

40605143 is a deficient number, since it is larger than the sum of its proper divisors (1952905).

40605143 is a wasteful number, since it uses less digits than its factorization.

40605143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7833.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40605143 is about 6372.2164903588. The cubic root of 40605143 is about 343.7111979122.

Adding to 40605143 its reverse (34150604), we get a palindrome (74755747).

The spelling of 40605143 in words is "forty million, six hundred five thousand, one hundred forty-three".