125491 has 4 divisors (see below), whose sum is σ = 127432. Its totient is φ = 123552.

The previous prime is 125471. The next prime is 125497. The reversal of 125491 is 194521.

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 125491 - 2⁹ = 124979 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 (125497) 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, 870 + ... + 1003.

It is an arithmetic number, because the mean of its divisors is an integer number (31858).

2¹²⁵⁴⁹¹ is an apocalyptic number.

125491 is a deficient number, since it is larger than the sum of its proper divisors (1941).

125491 is an equidigital number, since it uses as much as digits as its factorization.

125491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940.

The product of its digits is 360, while the sum is 22.

The square root of 125491 is about 354.2470889083. The cubic root of 125491 is about 50.0653811355.

It can be divided in two parts, 125 and 491, that added together give a palindrome (616).

The spelling of 125491 in words is "one hundred twenty-five thousand, four hundred ninety-one".