129055461 has 8 divisors (see below), whose sum is σ = 179555520. Its totient is φ = 82296192.

The previous prime is 129055457. The next prime is 129055463. The reversal of 129055461 is 164550921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129055461 - 2² = 129055457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129055463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935116 + ... + 935253.

It is an arithmetic number, because the mean of its divisors is an integer number (22444440).

Almost surely, 2^129055461 is an apocalyptic number.

It is an amenable number.

129055461 is a deficient number, since it is larger than the sum of its proper divisors (50500059).

129055461 is a wasteful number, since it uses less digits than its factorization.

129055461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870395.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 129055461 is about 11360.2579636204. The cubic root of 129055461 is about 505.3498356944.

The spelling of 129055461 in words is "one hundred twenty-nine million, fifty-five thousand, four hundred sixty-one".