125987 has 4 divisors (see below), whose sum is σ = 133416. Its totient is φ = 118560.

The previous prime is 125963. The next prime is 126001. The reversal of 125987 is 789521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789521 = 23 ⋅34327.

It is a cyclic number.

It is not a de Polignac number, because 125987 - 2⁸ = 125731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125927) 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, 3689 + ... + 3722.

It is an arithmetic number, because the mean of its divisors is an integer number (33354).

2¹²⁵⁹⁸⁷ is an apocalyptic number.

125987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

125987 is a deficient number, since it is larger than the sum of its proper divisors (7429).

125987 is an equidigital number, since it uses as much as digits as its factorization.

125987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7428.

The product of its digits is 5040, while the sum is 32.

The square root of 125987 is about 354.9464748381. The cubic root of 125987 is about 50.1312551403.

The spelling of 125987 in words is "one hundred twenty-five thousand, nine hundred eighty-seven".