129641449 has 16 divisors (see below), whose sum is σ = 152320000. Its totient is φ = 108046224.

The previous prime is 129641443. The next prime is 129641461. The reversal of 129641449 is 944146921.

It is a cyclic number.

It is not a de Polignac number, because 129641449 - 2⁵ = 129641417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129641443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35302 + ... + 38800.

It is an arithmetic number, because the mean of its divisors is an integer number (9520000).

Almost surely, 2^129641449 is an apocalyptic number.

It is an amenable number.

129641449 is a deficient number, since it is larger than the sum of its proper divisors (22678551).

129641449 is an equidigital number, since it uses as much as digits as its factorization.

129641449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3652.

The product of its digits is 62208, while the sum is 40.

The square root of 129641449 is about 11386.0198928335. The cubic root of 129641449 is about 506.1135431845.

The spelling of 129641449 in words is "one hundred twenty-nine million, six hundred forty-one thousand, four hundred forty-nine".