129854 has 4 divisors (see below), whose sum is σ = 194784. Its totient is φ = 64926.

The previous prime is 129853. The next prime is 129887. The reversal of 129854 is 458921.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×129854² = 33724122632, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32462 + ... + 32465.

It is an arithmetic number, because the mean of its divisors is an integer number (48696).

2¹²⁹⁸⁵⁴ is an apocalyptic number.

129854 is a deficient number, since it is larger than the sum of its proper divisors (64930).

129854 is an equidigital number, since it uses as much as digits as its factorization.

129854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64929.

The product of its digits is 2880, while the sum is 29.

The square root of 129854 is about 360.3526050967. The cubic root of 129854 is about 50.6389988214.

The spelling of 129854 in words is "one hundred twenty-nine thousand, eight hundred fifty-four".