129145471 has 16 divisors (see below), whose sum is σ = 161953344. Its totient is φ = 100249344.

The previous prime is 129145453. The next prime is 129145493. The reversal of 129145471 is 174541921.

It is not a de Polignac number, because 129145471 - 2⁷ = 129145343 is a prime.

It is a super-3 number, since 3×129145471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129145571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8566 + ... + 18211.

It is an arithmetic number, because the mean of its divisors is an integer number (10122084).

Almost surely, 2^129145471 is an apocalyptic number.

129145471 is a deficient number, since it is larger than the sum of its proper divisors (32807873).

129145471 is a wasteful number, since it uses less digits than its factorization.

129145471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26850.

The product of its digits is 10080, while the sum is 34.

The square root of 129145471 is about 11364.2188908873. The cubic root of 129145471 is about 505.4672941565.

The spelling of 129145471 in words is "one hundred twenty-nine million, one hundred forty-five thousand, four hundred seventy-one".