143240247 has 12 divisors (see below), whose sum is σ = 208483704. Its totient is φ = 94763760.

The previous prime is 143240231. The next prime is 143240257. The reversal of 143240247 is 742042341.

It is not a de Polignac number, because 143240247 - 2⁴ = 143240231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143240247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143240257) 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 11 ways as a sum of consecutive naturals, for example, 59568 + ... + 61925.

It is an arithmetic number, because the mean of its divisors is an integer number (17373642).

Almost surely, 2^143240247 is an apocalyptic number.

143240247 is a deficient number, since it is larger than the sum of its proper divisors (65243457).

143240247 is a wasteful number, since it uses less digits than its factorization.

143240247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121630 (or 121627 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 143240247 is about 11968.3017592305. The cubic root of 143240247 is about 523.2248398659.

Adding to 143240247 its reverse (742042341), we get a palindrome (885282588).

The spelling of 143240247 in words is "one hundred forty-three million, two hundred forty thousand, two hundred forty-seven".