125861 has 4 divisors (see below), whose sum is σ = 128832. Its totient is φ = 122892.

The previous prime is 125821. The next prime is 125863. The reversal of 125861 is 168521.

125861 = T₅₄ + T₅₅ + ... + T₉₆.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125863) 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 3 ways as a sum of consecutive naturals, for example, 1421 + ... + 1506.

It is an arithmetic number, because the mean of its divisors is an integer number (32208).

2¹²⁵⁸⁶¹ is an apocalyptic number.

It is an amenable number.

125861 is a deficient number, since it is larger than the sum of its proper divisors (2971).

125861 is an equidigital number, since it uses as much as digits as its factorization.

125861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970.

The product of its digits is 480, while the sum is 23.

The square root of 125861 is about 354.7689388884. The cubic root of 125861 is about 50.1145374232.

The spelling of 125861 in words is "one hundred twenty-five thousand, eight hundred sixty-one".