40207247 has 4 divisors (see below), whose sum is σ = 40278480. Its totient is φ = 40136016.

The previous prime is 40207201. The next prime is 40207267. The reversal of 40207247 is 74270204.

40207247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40207247 - 2¹⁴ = 40190863 is a prime.

It is a super-2 number, since 2×40207247² = 3233245422638018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40207267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34763 + ... + 35900.

It is an arithmetic number, because the mean of its divisors is an integer number (10069620).

Almost surely, 2^40207247 is an apocalyptic number.

40207247 is a deficient number, since it is larger than the sum of its proper divisors (71233).

40207247 is an equidigital number, since it uses as much as digits as its factorization.

40207247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71232.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 40207247 is about 6340.9184665946. The cubic root of 40207247 is about 342.5848178237.

The spelling of 40207247 in words is "forty million, two hundred seven thousand, two hundred forty-seven".