43140247 has 4 divisors (see below), whose sum is σ = 43426096. Its totient is φ = 42854400.

The previous prime is 43140233. The next prime is 43140259. The reversal of 43140247 is 74204134.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43140247 is a prime.

It is a super-2 number, since 2×43140247² = 3722161822442018, 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 (43140547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142698 + ... + 142999.

It is an arithmetic number, because the mean of its divisors is an integer number (10856524).

Almost surely, 2^43140247 is an apocalyptic number.

43140247 is a deficient number, since it is larger than the sum of its proper divisors (285849).

43140247 is a wasteful number, since it uses less digits than its factorization.

43140247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285848.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 43140247 is about 6568.1235524311. The cubic root of 43140247 is about 350.7202772437.

The spelling of 43140247 in words is "forty-three million, one hundred forty thousand, two hundred forty-seven".