129219541 has 4 divisors (see below), whose sum is σ = 140966784. Its totient is φ = 117472300.

The previous prime is 129219529. The next prime is 129219547. The reversal of 129219541 is 145912921.

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 not a de Polignac number, because 129219541 - 2¹⁵ = 129186773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129219497 and 129219506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129219547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5873605 + ... + 5873626.

It is an arithmetic number, because the mean of its divisors is an integer number (35241696).

Almost surely, 2^129219541 is an apocalyptic number.

129219541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129219541 is a deficient number, since it is larger than the sum of its proper divisors (11747243).

129219541 is a wasteful number, since it uses less digits than its factorization.

129219541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11747242.

The product of its digits is 6480, while the sum is 34.

The square root of 129219541 is about 11367.4773366829. The cubic root of 129219541 is about 505.5639108031.

The spelling of 129219541 in words is "one hundred twenty-nine million, two hundred nineteen thousand, five hundred forty-one".