125750129 has 4 divisors (see below), whose sum is σ = 126863076. Its totient is φ = 124637184.

The previous prime is 125750111. The next prime is 125750221. The reversal of 125750129 is 921057521.

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: 921057521 = 109 ⋅8450069.

It can be written as a sum of positive squares in 2 ways, for example, as 12285025 + 113465104 = 3505^2 + 10652^2 .

It is a cyclic number.

It is not a de Polignac number, because 125750129 - 2²⁰ = 124701553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125750095 and 125750104.

It is not an unprimeable number, because it can be changed into a prime (125750329) 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, 556304 + ... + 556529.

It is an arithmetic number, because the mean of its divisors is an integer number (31715769).

Almost surely, 2^125750129 is an apocalyptic number.

It is an amenable number.

125750129 is a deficient number, since it is larger than the sum of its proper divisors (1112947).

125750129 is a wasteful number, since it uses less digits than its factorization.

125750129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112946.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 125750129 is about 11213.8364978271. The cubic root of 125750129 is about 500.9981779555.

The spelling of 125750129 in words is "one hundred twenty-five million, seven hundred fifty thousand, one hundred twenty-nine".