129253101 has 4 divisors (see below), whose sum is σ = 172337472. Its totient is φ = 86168732.

The previous prime is 129253097. The next prime is 129253133. The reversal of 129253101 is 101352921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101352921 = 3 ⋅33784307.

It is a cyclic number.

It is not a de Polignac number, because 129253101 - 2² = 129253097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129253171) 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, 21542181 + ... + 21542186.

It is an arithmetic number, because the mean of its divisors is an integer number (43084368).

Almost surely, 2^129253101 is an apocalyptic number.

It is an amenable number.

129253101 is a deficient number, since it is larger than the sum of its proper divisors (43084371).

129253101 is an equidigital number, since it uses as much as digits as its factorization.

129253101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43084370.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 129253101 is about 11368.9533819081. The cubic root of 129253101 is about 505.6076741949.

The spelling of 129253101 in words is "one hundred twenty-nine million, two hundred fifty-three thousand, one hundred one".