1387111 has 8 divisors (see below), whose sum is σ = 1545984. Its totient is φ = 1233720.

The previous prime is 1387109. The next prime is 1387117. The reversal of 1387111 is 1117831.

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 1387111 - 2¹ = 1387109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387117) 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 7 ways as a sum of consecutive naturals, for example, 825 + ... + 1858.

It is an arithmetic number, because the mean of its divisors is an integer number (193248).

2^1387111 is an apocalyptic number.

1387111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1387111 is a deficient number, since it is larger than the sum of its proper divisors (158873).

1387111 is a wasteful number, since it uses less digits than its factorization.

1387111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741.

The product of its digits is 168, while the sum is 22.

The square root of 1387111 is about 1177.7567660600. The cubic root of 1387111 is about 111.5245309228.

The spelling of 1387111 in words is "one million, three hundred eighty-seven thousand, one hundred eleven".