125401 has 4 divisors (see below), whose sum is σ = 126900. Its totient is φ = 123904.

The previous prime is 125399. The next prime is 125407. The reversal of 125401 is 104521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104521 = 127 ⋅823.

It can be written as a sum of positive squares in 2 ways, for example, as 9801 + 115600 = 99^2 + 340^2 .

It is a 4-Lehmer number, since φ(125401) divides (125401-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 125401 - 2¹ = 125399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125407) 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, 616 + ... + 793.

It is an arithmetic number, because the mean of its divisors is an integer number (31725).

2¹²⁵⁴⁰¹ is an apocalyptic number.

It is an amenable number.

125401 is a deficient number, since it is larger than the sum of its proper divisors (1499).

125401 is an equidigital number, since it uses as much as digits as its factorization.

125401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 125401 is about 354.1200361459. The cubic root of 125401 is about 50.0534095947.

Adding to 125401 its reverse (104521), we get a palindrome (229922).

The spelling of 125401 in words is "one hundred twenty-five thousand, four hundred one".