12400129 has 8 divisors (see below), whose sum is σ = 14251328. Its totient is φ = 10568880.

The previous prime is 12400127. The next prime is 12400169. The reversal of 12400129 is 92100421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12400129 - 2¹ = 12400127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12400127) 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 7 ways as a sum of consecutive naturals, for example, 3627 + ... + 6160.

It is an arithmetic number, because the mean of its divisors is an integer number (1781416).

Almost surely, 2^12400129 is an apocalyptic number.

It is an amenable number.

12400129 is a deficient number, since it is larger than the sum of its proper divisors (1851199).

12400129 is an equidigital number, since it uses as much as digits as its factorization.

12400129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9975.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 12400129 is about 3521.3816890533. The cubic root of 12400129 is about 231.4597080896.

The spelling of 12400129 in words is "twelve million, four hundred thousand, one hundred twenty-nine".