139887 has 20 divisors (see below), whose sum is σ = 229416. Its totient is φ = 84240.

The previous prime is 139883. The next prime is 139891. The reversal of 139887 is 788931.

139887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139883) and next prime (139891).

It is not a de Polignac number, because 139887 - 2² = 139883 is a prime.

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139887.

It is not an unprimeable number, because it can be changed into a prime (139883) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 813 + ... + 969.

2¹³⁹⁸⁸⁷ is an apocalyptic number.

139887 is a deficient number, since it is larger than the sum of its proper divisors (89529).

139887 is a wasteful number, since it uses less digits than its factorization.

139887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 171 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 139887 is about 374.0147055932. The cubic root of 139887 is about 51.9109669764.

It can be divided in two parts, 1398 and 87, that added together give a triangular number (1485 = T₅₄).

The spelling of 139887 in words is "one hundred thirty-nine thousand, eight hundred eighty-seven".