129741251 has 2 divisors, whose sum is σ = 129741252. Its totient is φ = 129741250.

The previous prime is 129741247. The next prime is 129741257. The reversal of 129741251 is 152147921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129741251 - 2² = 129741247 is a prime.

It is a super-2 number, since 2×129741251² = 33665584422090002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129741257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64870625 + 64870626.

It is an arithmetic number, because the mean of its divisors is an integer number (64870626).

Almost surely, 2^129741251 is an apocalyptic number.

129741251 is a deficient number, since it is larger than the sum of its proper divisors (1).

129741251 is an equidigital number, since it uses as much as digits as its factorization.

129741251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 129741251 is about 11390.4017049444. The cubic root of 129741251 is about 506.2433838286.

The spelling of 129741251 in words is "one hundred twenty-nine million, seven hundred forty-one thousand, two hundred fifty-one".