1440012143 has 8 divisors (see below), whose sum is σ = 1444788576. Its totient is φ = 1435244800.

The previous prime is 1440012107. The next prime is 1440012151. The reversal of 1440012143 is 3412100441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1440012143 - 2¹⁰ = 1440011119 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 (1440012103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449678 + ... + 452868.

It is an arithmetic number, because the mean of its divisors is an integer number (180598572).

Almost surely, 2^1440012143 is an apocalyptic number.

1440012143 is a deficient number, since it is larger than the sum of its proper divisors (4776433).

1440012143 is an equidigital number, since it uses as much as digits as its factorization.

1440012143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1440012143 is about 37947.4919197567. The cubic root of 1440012143 is about 1129.2464088151.

Adding to 1440012143 its reverse (3412100441), we get a palindrome (4852112584).

The spelling of 1440012143 in words is "one billion, four hundred forty million, twelve thousand, one hundred forty-three".