8129145 has 32 divisors (see below), whose sum is σ = 13996800. Its totient is φ = 4014080.

The previous prime is 8129141. The next prime is 8129153. The reversal of 8129145 is 5419218.

It is a happy number.

8129145 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8129145 - 2² = 8129141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8129141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17881 + ... + 18329.

It is an arithmetic number, because the mean of its divisors is an integer number (437400).

Almost surely, 2^8129145 is an apocalyptic number.

8129145 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8129145 is a deficient number, since it is larger than the sum of its proper divisors (5867655).

8129145 is a wasteful number, since it uses less digits than its factorization.

8129145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545.

The product of its digits is 2880, while the sum is 30.

The square root of 8129145 is about 2851.1655511387. The cubic root of 8129145 is about 201.0704685961.

The spelling of 8129145 in words is "eight million, one hundred twenty-nine thousand, one hundred forty-five".