129241787 has 2 divisors, whose sum is σ = 129241788. Its totient is φ = 129241786.

The previous prime is 129241711. The next prime is 129241813. The reversal of 129241787 is 787142921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129241787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129241687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64620893 + 64620894.

It is an arithmetic number, because the mean of its divisors is an integer number (64620894).

Almost surely, 2^129241787 is an apocalyptic number.

129241787 is a deficient number, since it is larger than the sum of its proper divisors (1).

129241787 is an equidigital number, since it uses as much as digits as its factorization.

129241787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 41.

The square root of 129241787 is about 11368.4557878368. The cubic root of 129241787 is about 505.5929211971.

The spelling of 129241787 in words is "one hundred twenty-nine million, two hundred forty-one thousand, seven hundred eighty-seven".