129627601 has 8 divisors (see below), whose sum is σ = 137647944. Its totient is φ = 121651200.

The previous prime is 129627581. The next prime is 129627629. The reversal of 129627601 is 106726921.

It can be written as a sum of positive squares in 4 ways, for example, as 56610576 + 73017025 = 7524^2 + 8545^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 129627601 - 2⁷ = 129627473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129627401) 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, 4800 + ... + 16801.

It is an arithmetic number, because the mean of its divisors is an integer number (17205993).

Almost surely, 2^129627601 is an apocalyptic number.

It is an amenable number.

129627601 is a deficient number, since it is larger than the sum of its proper divisors (8020343).

129627601 is a wasteful number, since it uses less digits than its factorization.

129627601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21971.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 129627601 is about 11385.4117624265. The cubic root of 129627601 is about 506.0955219165.

The spelling of 129627601 in words is "one hundred twenty-nine million, six hundred twenty-seven thousand, six hundred one".