129201251 has 2 divisors, whose sum is σ = 129201252. Its totient is φ = 129201250.

The previous prime is 129201217. The next prime is 129201269. The reversal of 129201251 is 152102921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129201251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129201551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64600625 + 64600626.

It is an arithmetic number, because the mean of its divisors is an integer number (64600626).

Almost surely, 2^129201251 is an apocalyptic number.

129201251 is a deficient number, since it is larger than the sum of its proper divisors (1).

129201251 is an equidigital number, since it uses as much as digits as its factorization.

129201251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 129201251 is about 11366.6728201352. The cubic root of 129201251 is about 505.5400568252.

The spelling of 129201251 in words is "one hundred twenty-nine million, two hundred one thousand, two hundred fifty-one".