140820143 has 4 divisors (see below), whose sum is σ = 145676040. Its totient is φ = 135964248.

The previous prime is 140820137. The next prime is 140820149. The reversal of 140820143 is 341028041.

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

It is an interprime number because it is at equal distance from previous prime (140820137) and next prime (140820149).

It is a cyclic number.

It is not a de Polignac number, because 140820143 - 2¹² = 140816047 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 (140820149) 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, 2427905 + ... + 2427962.

It is an arithmetic number, because the mean of its divisors is an integer number (36419010).

Almost surely, 2^140820143 is an apocalyptic number.

140820143 is a deficient number, since it is larger than the sum of its proper divisors (4855897).

140820143 is an equidigital number, since it uses as much as digits as its factorization.

140820143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4855896.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 140820143 is about 11866.7663244879. The cubic root of 140820143 is about 520.2613860931.

Adding to 140820143 its reverse (341028041), we get a palindrome (481848184).

The spelling of 140820143 in words is "one hundred forty million, eight hundred twenty thousand, one hundred forty-three".