129252647 has 2 divisors, whose sum is σ = 129252648. Its totient is φ = 129252646.

The previous prime is 129252631. The next prime is 129252659. The reversal of 129252647 is 746252921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129252647 - 2⁴ = 129252631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129252647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129252667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64626323 + 64626324.

It is an arithmetic number, because the mean of its divisors is an integer number (64626324).

Almost surely, 2^129252647 is an apocalyptic number.

129252647 is a deficient number, since it is larger than the sum of its proper divisors (1).

129252647 is an equidigital number, since it uses as much as digits as its factorization.

129252647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 129252647 is about 11368.9334152329. The cubic root of 129252647 is about 505.6070822139.

The spelling of 129252647 in words is "one hundred twenty-nine million, two hundred fifty-two thousand, six hundred forty-seven".