129255419 has 2 divisors, whose sum is σ = 129255420. Its totient is φ = 129255418.

The previous prime is 129255409. The next prime is 129255481. The reversal of 129255419 is 914552921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129255419 is a prime.

It is a super-2 number, since 2×129255419² = 33413926681731122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129255409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64627709 + 64627710.

It is an arithmetic number, because the mean of its divisors is an integer number (64627710).

Almost surely, 2^129255419 is an apocalyptic number.

129255419 is a deficient number, since it is larger than the sum of its proper divisors (1).

129255419 is an equidigital number, since it uses as much as digits as its factorization.

129255419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 129255419 is about 11369.0553257516. The cubic root of 129255419 is about 505.6106966668.

The spelling of 129255419 in words is "one hundred twenty-nine million, two hundred fifty-five thousand, four hundred nineteen".