140687 has 4 divisors (see below), whose sum is σ = 141480. Its totient is φ = 139896.

The previous prime is 140683. The next prime is 140689. The reversal of 140687 is 786041.

140687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 786041 = 71 ⋅11071.

It is a cyclic number.

It is not a de Polignac number, because 140687 - 2² = 140683 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

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 140687.

It is not an unprimeable number, because it can be changed into a prime (140681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8 + ... + 530.

It is an arithmetic number, because the mean of its divisors is an integer number (35370).

2¹⁴⁰⁶⁸⁷ is an apocalyptic number.

140687 is a deficient number, since it is larger than the sum of its proper divisors (793).

140687 is an equidigital number, since it uses as much as digits as its factorization.

140687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 140687 is about 375.0826575570. The cubic root of 140687 is about 52.0097368355.

The spelling of 140687 in words is "one hundred forty thousand, six hundred eighty-seven".