1401143 has 4 divisors (see below), whose sum is σ = 1403520. Its totient is φ = 1398768.

The previous prime is 1401139. The next prime is 1401151. The reversal of 1401143 is 3411041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3411041 = 173 ⋅19717.

It is a cyclic number.

It is not a de Polignac number, because 1401143 - 2² = 1401139 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401443) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 443 + ... + 1731.

It is an arithmetic number, because the mean of its divisors is an integer number (350880).

2^1401143 is an apocalyptic number.

1401143 is a deficient number, since it is larger than the sum of its proper divisors (2377).

1401143 is a wasteful number, since it uses less digits than its factorization.

1401143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1401143 is about 1183.6988637318. The cubic root of 1401143 is about 111.8993302472.

Adding to 1401143 its reverse (3411041), we get a palindrome (4812184).

The spelling of 1401143 in words is "one million, four hundred one thousand, one hundred forty-three".