129491446 has 16 divisors (see below), whose sum is σ = 223952544. Its totient is φ = 55004544.

The previous prime is 129491443. The next prime is 129491459. The reversal of 129491446 is 644194921.

It is a junction number, because it is equal to n+sod(n) for n = 129491399 and 129491408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129491443) 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 7 ways as a sum of consecutive naturals, for example, 39345 + ... + 42508.

It is an arithmetic number, because the mean of its divisors is an integer number (13997034).

Almost surely, 2^129491446 is an apocalyptic number.

129491446 is a deficient number, since it is larger than the sum of its proper divisors (94461098).

129491446 is a wasteful number, since it uses less digits than its factorization.

129491446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81975.

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

The square root of 129491446 is about 11379.4308293517. The cubic root of 129491446 is about 505.9182665195.

The spelling of 129491446 in words is "one hundred twenty-nine million, four hundred ninety-one thousand, four hundred forty-six".