129486149 has 4 divisors (see below), whose sum is σ = 139446636. Its totient is φ = 119525664.

The previous prime is 129486107. The next prime is 129486187. The reversal of 129486149 is 941684921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941684921 = 6959 ⋅135319.

It can be written as a sum of positive squares in 2 ways, for example, as 11437924 + 118048225 = 3382^2 + 10865^2 .

It is a cyclic number.

It is not a de Polignac number, because 129486149 - 2¹² = 129482053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129486449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4980224 + ... + 4980249.

It is an arithmetic number, because the mean of its divisors is an integer number (34861659).

Almost surely, 2^129486149 is an apocalyptic number.

It is an amenable number.

129486149 is a deficient number, since it is larger than the sum of its proper divisors (9960487).

129486149 is an equidigital number, since it uses as much as digits as its factorization.

129486149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960486.

The product of its digits is 124416, while the sum is 44.

The square root of 129486149 is about 11379.1980824661. The cubic root of 129486149 is about 505.9113680314.

The spelling of 129486149 in words is "one hundred twenty-nine million, four hundred eighty-six thousand, one hundred forty-nine".