129040461 has 12 divisors (see below), whose sum is σ = 203336640. Its totient is φ = 78206280.

The previous prime is 129040453. The next prime is 129040519. The reversal of 129040461 is 164040921.

It is not a de Polignac number, because 129040461 - 2³ = 129040453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129040411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 651621 + ... + 651818.

It is an arithmetic number, because the mean of its divisors is an integer number (16944720).

Almost surely, 2^129040461 is an apocalyptic number.

129040461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129040461 is a deficient number, since it is larger than the sum of its proper divisors (74296179).

129040461 is a wasteful number, since it uses less digits than its factorization.

129040461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303456 (or 1303453 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 129040461 is about 11359.5977481599. The cubic root of 129040461 is about 505.3302561504.

The spelling of 129040461 in words is "one hundred twenty-nine million, forty thousand, four hundred sixty-one".