125155 has 4 divisors (see below), whose sum is σ = 150192. Its totient is φ = 100120.

The previous prime is 125149. The next prime is 125183. The reversal of 125155 is 551521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551521 = 31 ⋅17791.

It is not a de Polignac number, because 125155 - 2⁹ = 124643 is a prime.

It is a Duffinian number.

125155 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12511 + ... + 12520.

It is an arithmetic number, because the mean of its divisors is an integer number (37548).

2¹²⁵¹⁵⁵ is an apocalyptic number.

125155 is a deficient number, since it is larger than the sum of its proper divisors (25037).

125155 is an equidigital number, since it uses as much as digits as its factorization.

125155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25036.

The product of its digits is 250, while the sum is 19.

The square root of 125155 is about 353.7725257846. The cubic root of 125155 is about 50.0206581303.

Adding to 125155 its reverse (551521), we get a palindrome (676676).

The spelling of 125155 in words is "one hundred twenty-five thousand, one hundred fifty-five".