40013247 has 8 divisors (see below), whose sum is σ = 53436544. Its totient is φ = 26632728.

The previous prime is 40013227. The next prime is 40013249. The reversal of 40013247 is 74231004.

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

It is not a de Polignac number, because 40013247 - 2²⁰ = 38964671 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 (40013249) 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, 8443 + ... + 12300.

It is an arithmetic number, because the mean of its divisors is an integer number (6679568).

Almost surely, 2^40013247 is an apocalyptic number.

40013247 is a deficient number, since it is larger than the sum of its proper divisors (13423297).

40013247 is a wasteful number, since it uses less digits than its factorization.

40013247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21389.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40013247 is about 6325.6025009480. The cubic root of 40013247 is about 342.0329385874.

The spelling of 40013247 in words is "forty million, thirteen thousand, two hundred forty-seven".