140520143 has 4 divisors (see below), whose sum is σ = 147915960. Its totient is φ = 133124328.

The previous prime is 140520137. The next prime is 140520157. The reversal of 140520143 is 341025041.

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-140520143 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 (140520343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3697880 + ... + 3697917.

It is an arithmetic number, because the mean of its divisors is an integer number (36978990).

Almost surely, 2^140520143 is an apocalyptic number.

140520143 is a deficient number, since it is larger than the sum of its proper divisors (7395817).

140520143 is an equidigital number, since it uses as much as digits as its factorization.

140520143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7395816.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 140520143 is about 11854.1192418501. The cubic root of 140520143 is about 519.8916724543.

Adding to 140520143 its reverse (341025041), we get a palindrome (481545184).

The spelling of 140520143 in words is "one hundred forty million, five hundred twenty thousand, one hundred forty-three".