129126157 has 2 divisors, whose sum is σ = 129126158. Its totient is φ = 129126156.

The previous prime is 129126149. The next prime is 129126167. The reversal of 129126157 is 751621921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126472516 + 2653641 = 11246^2 + 1629^2 .

It is a cyclic number.

It is not a de Polignac number, because 129126157 - 2³ = 129126149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129126167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64563078 + 64563079.

It is an arithmetic number, because the mean of its divisors is an integer number (64563079).

Almost surely, 2^129126157 is an apocalyptic number.

It is an amenable number.

129126157 is a deficient number, since it is larger than the sum of its proper divisors (1).

129126157 is an equidigital number, since it uses as much as digits as its factorization.

129126157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 34.

The square root of 129126157 is about 11363.3690866750. The cubic root of 129126157 is about 505.4420949710.

The spelling of 129126157 in words is "one hundred twenty-nine million, one hundred twenty-six thousand, one hundred fifty-seven".