12972129 has 8 divisors (see below), whose sum is σ = 17464512. Its totient is φ = 8563920.

The previous prime is 12972107. The next prime is 12972131. The reversal of 12972129 is 92127921.

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

It is not a de Polignac number, because 12972129 - 2⁵ = 12972097 is a prime.

It is a super-2 number, since 2×12972129² = 336552261585282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12972129.

It is not an unprimeable number, because it can be changed into a prime (12972149) 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, 20682 + ... + 21299.

It is an arithmetic number, because the mean of its divisors is an integer number (2183064).

Almost surely, 2^12972129 is an apocalyptic number.

It is an amenable number.

12972129 is a deficient number, since it is larger than the sum of its proper divisors (4492383).

12972129 is a wasteful number, since it uses less digits than its factorization.

12972129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42087.

The product of its digits is 4536, while the sum is 33.

The square root of 12972129 is about 3601.6841893759. The cubic root of 12972129 is about 234.9653125201.

The spelling of 12972129 in words is "twelve million, nine hundred seventy-two thousand, one hundred twenty-nine".