129514021 has 8 divisors (see below), whose sum is σ = 159401984. Its totient is φ = 102472560.

The previous prime is 129514019. The next prime is 129514031. The reversal of 129514021 is 120415921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 129514021 - 2¹ = 129514019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129514031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711525 + ... + 711706.

It is an arithmetic number, because the mean of its divisors is an integer number (19925248).

Almost surely, 2^129514021 is an apocalyptic number.

It is an amenable number.

129514021 is a deficient number, since it is larger than the sum of its proper divisors (29887963).

129514021 is a wasteful number, since it uses less digits than its factorization.

129514021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423251.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 129514021 is about 11380.4227074393. The cubic root of 129514021 is about 505.9476647065.

Adding to 129514021 its reverse (120415921), we get a palindrome (249929942).

The spelling of 129514021 in words is "one hundred twenty-nine million, five hundred fourteen thousand, twenty-one".