40017247 has 4 divisors (see below), whose sum is σ = 40166280. Its totient is φ = 39868216.

The previous prime is 40017227. The next prime is 40017283. The reversal of 40017247 is 74271004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40017247 - 2⁷ = 40017119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40017227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74113 + ... + 74650.

It is an arithmetic number, because the mean of its divisors is an integer number (10041570).

Almost surely, 2^40017247 is an apocalyptic number.

40017247 is a deficient number, since it is larger than the sum of its proper divisors (149033).

40017247 is a wasteful number, since it uses less digits than its factorization.

40017247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149032.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 40017247 is about 6325.9186684623. The cubic root of 40017247 is about 342.0443355311.

The spelling of 40017247 in words is "forty million, seventeen thousand, two hundred forty-seven".