123587 has 4 divisors (see below), whose sum is σ = 125160. Its totient is φ = 122016.

The previous prime is 123583. The next prime is 123593. The reversal of 123587 is 785321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123587 - 2² = 123583 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 123587.

It is not an unprimeable number, because it can be changed into a prime (123581) 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, 662 + ... + 827.

It is an arithmetic number, because the mean of its divisors is an integer number (31290).

2¹²³⁵⁸⁷ is an apocalyptic number.

123587 is a deficient number, since it is larger than the sum of its proper divisors (1573).

123587 is an equidigital number, since it uses as much as digits as its factorization.

123587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its digits is 1680, while the sum is 26.

The square root of 123587 is about 351.5494275347. The cubic root of 123587 is about 49.8108856168.

The spelling of 123587 in words is "one hundred twenty-three thousand, five hundred eighty-seven".