129981214 has 8 divisors (see below), whose sum is σ = 212696568. Its totient is φ = 59082360.

The previous prime is 129981197. The next prime is 129981287. The reversal of 129981214 is 412189921.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2954097 + ... + 2954140.

It is an arithmetic number, because the mean of its divisors is an integer number (26587071).

Almost surely, 2^129981214 is an apocalyptic number.

129981214 is a deficient number, since it is larger than the sum of its proper divisors (82715354).

129981214 is a wasteful number, since it uses less digits than its factorization.

129981214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908250.

The product of its digits is 10368, while the sum is 37.

The square root of 129981214 is about 11400.9304006296. The cubic root of 129981214 is about 506.5552991800. Note that the first 3 decimals are identical.

The spelling of 129981214 in words is "one hundred twenty-nine million, nine hundred eighty-one thousand, two hundred fourteen".