140143424 has 14 divisors (see below), whose sum is σ = 278097234. Its totient is φ = 70071680.

The previous prime is 140143403. The next prime is 140143463. The reversal of 140143424 is 424341041.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 135303424 + 4840000 = 11632^2 + 2200^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 140143424.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1094807 + ... + 1094934.

Almost surely, 2^140143424 is an apocalyptic number.

It is an amenable number.

140143424 is a deficient number, since it is larger than the sum of its proper divisors (137953810).

140143424 is an equidigital number, since it uses as much as digits as its factorization.

140143424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189753 (or 2189743 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 140143424 is about 11838.2187849355. The cubic root of 140143424 is about 519.4266659243.

Adding to 140143424 its reverse (424341041), we get a palindrome (564484465).

The spelling of 140143424 in words is "one hundred forty million, one hundred forty-three thousand, four hundred twenty-four".