129212471 has 2 divisors, whose sum is σ = 129212472. Its totient is φ = 129212470.

The previous prime is 129212453. The next prime is 129212513. The reversal of 129212471 is 174212921.

It is a weak prime.

It is an emirp because it is prime and its reverse (174212921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129212471 - 2¹⁴ = 129196087 is a prime.

It is a super-3 number, since 3×129212471³ (a number of 25 digits) contains 333 as substring.

It is equal to p_7336064 and since 129212471 and 7336064 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129218471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64606235 + 64606236.

It is an arithmetic number, because the mean of its divisors is an integer number (64606236).

Almost surely, 2^129212471 is an apocalyptic number.

129212471 is a deficient number, since it is larger than the sum of its proper divisors (1).

129212471 is an equidigital number, since it uses as much as digits as its factorization.

129212471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 129212471 is about 11367.1663575405. The cubic root of 129212471 is about 505.5546903141.

The spelling of 129212471 in words is "one hundred twenty-nine million, two hundred twelve thousand, four hundred seventy-one".