810129 has 16 divisors (see below), whose sum is σ = 1152000. Its totient is φ = 505296.

The previous prime is 810109. The next prime is 810137. The reversal of 810129 is 921018.

It is not a de Polignac number, because 810129 - 2¹¹ = 808081 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3972 + ... + 4170.

It is an arithmetic number, because the mean of its divisors is an integer number (72000).

2⁸¹⁰¹²⁹ is an apocalyptic number.

It is an amenable number.

810129 is a deficient number, since it is larger than the sum of its proper divisors (341871).

810129 is a wasteful number, since it uses less digits than its factorization.

810129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 810129 is about 900.0716638135. The cubic root of 810129 is about 93.2219234714.

Subtracting 810129 from its reverse (921018), we obtain a square (110889 = 333²).

It can be divided in two parts, 810 and 129, that added together give a palindrome (939).

The spelling of 810129 in words is "eight hundred ten thousand, one hundred twenty-nine".