129149 has 8 divisors (see below), whose sum is σ = 139968. Its totient is φ = 118720.

The previous prime is 129127. The next prime is 129169. The reversal of 129149 is 941921.

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

It is a cyclic number.

It is not a de Polignac number, because 129149 - 2¹² = 125053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129119) 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, 1154 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (17496).

2¹²⁹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

129149 is a deficient number, since it is larger than the sum of its proper divisors (10819).

129149 is a wasteful number, since it uses less digits than its factorization.

129149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195.

The product of its digits is 648, while the sum is 26.

The square root of 129149 is about 359.3730652122. The cubic root of 129149 is about 50.5471898210.

The spelling of 129149 in words is "one hundred twenty-nine thousand, one hundred forty-nine".