12500129 has 4 divisors (see below), whose sum is σ = 12509076. Its totient is φ = 12491184.

The previous prime is 12500101. The next prime is 12500177. The reversal of 12500129 is 92100521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8111104 + 4389025 = 2848^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 12500129 - 2⁸ = 12499873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12500129.

It is not an unprimeable number, because it can be changed into a prime (12500029) 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, 1874 + ... + 5339.

It is an arithmetic number, because the mean of its divisors is an integer number (3127269).

Almost surely, 2^12500129 is an apocalyptic number.

It is an amenable number.

12500129 is a deficient number, since it is larger than the sum of its proper divisors (8947).

12500129 is an equidigital number, since it uses as much as digits as its factorization.

12500129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8946.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 12500129 is about 3535.5521492406. The cubic root of 12500129 is about 232.0802400312.

The spelling of 12500129 in words is "twelve million, five hundred thousand, one hundred twenty-nine".