129166451 has 2 divisors, whose sum is σ = 129166452. Its totient is φ = 129166450.

The previous prime is 129166439. The next prime is 129166469. The reversal of 129166451 is 154661921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129166451 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (129166421) 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, 64583225 + 64583226.

It is an arithmetic number, because the mean of its divisors is an integer number (64583226).

Almost surely, 2^129166451 is an apocalyptic number.

129166451 is a deficient number, since it is larger than the sum of its proper divisors (1).

129166451 is an equidigital number, since it uses as much as digits as its factorization.

129166451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 129166451 is about 11365.1419260826. The cubic root of 129166451 is about 505.4946641436.

The spelling of 129166451 in words is "one hundred twenty-nine million, one hundred sixty-six thousand, four hundred fifty-one".