1387143 has 6 divisors (see below), whose sum is σ = 2003664. Its totient is φ = 924756.

The previous prime is 1387129. The next prime is 1387147. The reversal of 1387143 is 3417831.

It is not a de Polignac number, because 1387143 - 2⁹ = 1386631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77055 + ... + 77072.

It is an arithmetic number, because the mean of its divisors is an integer number (333944).

2^1387143 is an apocalyptic number.

1387143 is a deficient number, since it is larger than the sum of its proper divisors (616521).

1387143 is a wasteful number, since it uses less digits than its factorization.

1387143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154133 (or 154130 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 1387143 is about 1177.7703511296. The cubic root of 1387143 is about 111.5253885224.

The spelling of 1387143 in words is "one million, three hundred eighty-seven thousand, one hundred forty-three".