129078845 has 8 divisors (see below), whose sum is σ = 177022464. Its totient is φ = 88511184.

The previous prime is 129078839. The next prime is 129078853. The reversal of 129078845 is 548870921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129078845 - 2⁸ = 129078589 is a prime.

It is a super-2 number, since 2×129078845² = 33322696453068050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129078796 and 129078805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1843949 + ... + 1844018.

It is an arithmetic number, because the mean of its divisors is an integer number (22127808).

Almost surely, 2^129078845 is an apocalyptic number.

It is an amenable number.

129078845 is a deficient number, since it is larger than the sum of its proper divisors (47943619).

129078845 is an equidigital number, since it uses as much as digits as its factorization.

129078845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687979.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 129078845 is about 11361.2871189844. The cubic root of 129078845 is about 505.3803558723.

The spelling of 129078845 in words is "one hundred twenty-nine million, seventy-eight thousand, eight hundred forty-five".