129428545 has 8 divisors (see below), whose sum is σ = 155376360. Its totient is φ = 103501440.

The previous prime is 129428501. The next prime is 129428549. The reversal of 129428545 is 545824921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25877569 + 103550976 = 5087^2 + 10176^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-129428545 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129428498 and 129428507.

It is not an unprimeable number, because it can be changed into a prime (129428549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18085 + ... + 24205.

It is an arithmetic number, because the mean of its divisors is an integer number (19422045).

Almost surely, 2^129428545 is an apocalyptic number.

It is an amenable number.

129428545 is a deficient number, since it is larger than the sum of its proper divisors (25947815).

129428545 is an equidigital number, since it uses as much as digits as its factorization.

129428545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10355.

The product of its digits is 115200, while the sum is 40.

The square root of 129428545 is about 11376.6666910831. Note that the first 4 decimals coincide. The cubic root of 129428545 is about 505.8363359623.

The spelling of 129428545 in words is "one hundred twenty-nine million, four hundred twenty-eight thousand, five hundred forty-five".