129601431 has 8 divisors (see below), whose sum is σ = 192002160. Its totient is φ = 86400936.

The previous prime is 129601427. The next prime is 129601447. The reversal of 129601431 is 134106921.

129601431 is a `hidden beast` number, since 1 + 29 + 601 + 4 + 31 = 666.

It is not a de Polignac number, because 129601431 - 2² = 129601427 is a prime.

It is a super-2 number, since 2×129601431² = 33593061834495522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4800053 = 129601431 / (1 + 2 + 9 + 6 + 0 + 1 + 4 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 129601395 and 129601404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129601531) 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, 2400000 + ... + 2400053.

It is an arithmetic number, because the mean of its divisors is an integer number (24000270).

Almost surely, 2^129601431 is an apocalyptic number.

129601431 is a deficient number, since it is larger than the sum of its proper divisors (62400729).

129601431 is an equidigital number, since it uses as much as digits as its factorization.

129601431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800062 (or 4800056 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 129601431 is about 11384.2624267012. The cubic root of 129601431 is about 506.0614617547.

The spelling of 129601431 in words is "one hundred twenty-nine million, six hundred one thousand, four hundred thirty-one".