40512005 has 8 divisors (see below), whose sum is σ = 48648600. Its totient is φ = 32386816.

The previous prime is 40512001. The next prime is 40512011. The reversal of 40512005 is 50021504.

It can be written as a sum of positive squares in 4 ways, for example, as 2775556 + 37736449 = 1666^2 + 6143^2 .

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 40512005 - 2² = 40512001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40512001) 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, 12161 + ... + 15129.

It is an arithmetic number, because the mean of its divisors is an integer number (6081075).

Almost surely, 2^40512005 is an apocalyptic number.

It is an amenable number.

40512005 is a deficient number, since it is larger than the sum of its proper divisors (8136595).

40512005 is a wasteful number, since it uses less digits than its factorization.

40512005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5703.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 40512005 is about 6364.9041626721. The cubic root of 40512005 is about 343.4482010052.

Adding to 40512005 its reverse (50021504), we get a palindrome (90533509).

It can be divided in two parts, 405 and 12005, that multiplied together give a square (4862025 = 2205²).

The spelling of 40512005 in words is "forty million, five hundred twelve thousand, five".