125426129 has 4 divisors (see below), whose sum is σ = 125450676. Its totient is φ = 125401584.

The previous prime is 125426123. The next prime is 125426137. The reversal of 125426129 is 921624521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921624521 = 199 ⋅4631279.

It can be written as a sum of positive squares in 2 ways, for example, as 41667025 + 83759104 = 6455^2 + 9152^2 .

It is a cyclic number.

It is not a de Polignac number, because 125426129 - 2¹⁶ = 125360593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125426095 and 125426104.

It is not an unprimeable number, because it can be changed into a prime (125426123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394 + ... + 15899.

It is an arithmetic number, because the mean of its divisors is an integer number (31362669).

Almost surely, 2^125426129 is an apocalyptic number.

It is an amenable number.

125426129 is a deficient number, since it is larger than the sum of its proper divisors (24547).

125426129 is an equidigital number, since it uses as much as digits as its factorization.

125426129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24546.

The product of its digits is 8640, while the sum is 32.

The square root of 125426129 is about 11199.3807418089. The cubic root of 125426129 is about 500.5675275812.

The spelling of 125426129 in words is "one hundred twenty-five million, four hundred twenty-six thousand, one hundred twenty-nine".