125611 has 4 divisors (see below), whose sum is σ = 127800. Its totient is φ = 123424.

The previous prime is 125597. The next prime is 125617. The reversal of 125611 is 116521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 116521 = 109 ⋅1069.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125611 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125617) 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, 1006 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (31950).

2¹²⁵⁶¹¹ is an apocalyptic number.

125611 is the 159-th centered decagonal number.

125611 is a deficient number, since it is larger than the sum of its proper divisors (2189).

125611 is an equidigital number, since it uses as much as digits as its factorization.

125611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188.

The product of its digits is 60, while the sum is 16.

The square root of 125611 is about 354.4164217414. The cubic root of 125611 is about 50.0813342896.

The spelling of 125611 in words is "one hundred twenty-five thousand, six hundred eleven".