129014421 has 4 divisors (see below), whose sum is σ = 172019232. Its totient is φ = 86009612.

The previous prime is 129014393. The next prime is 129014443. The reversal of 129014421 is 124410921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129014421 - 2⁶ = 129014357 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129014391 and 129014400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129014461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21502401 + ... + 21502406.

It is an arithmetic number, because the mean of its divisors is an integer number (43004808).

Almost surely, 2^129014421 is an apocalyptic number.

It is an amenable number.

129014421 is a deficient number, since it is larger than the sum of its proper divisors (43004811).

129014421 is an equidigital number, since it uses as much as digits as its factorization.

129014421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43004810.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 129014421 is about 11358.4515229850. The cubic root of 129014421 is about 505.2962624583.

The spelling of 129014421 in words is "one hundred twenty-nine million, fourteen thousand, four hundred twenty-one".