129498 has 16 divisors (see below), whose sum is σ = 262656. Its totient is φ = 42560.

The previous prime is 129497. The next prime is 129499. The reversal of 129498 is 894921.

It is an interprime number because it is at equal distance from previous prime (129497) and next prime (129499).

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

It is not an unprimeable number, because it can be changed into a prime (129491) 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, 583 + ... + 773.

It is an arithmetic number, because the mean of its divisors is an integer number (16416).

2¹²⁹⁴⁹⁸ is an apocalyptic number.

129498 is an abundant number, since it is smaller than the sum of its proper divisors (133158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129498 is a wasteful number, since it uses less digits than its factorization.

129498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its digits is 5184, while the sum is 33.

The square root of 129498 is about 359.8583054481. The cubic root of 129498 is about 50.5926801787.

The spelling of 129498 in words is "one hundred twenty-nine thousand, four hundred ninety-eight".