129481945 has 16 divisors (see below), whose sum is σ = 168023808. Its totient is φ = 95415040.

The previous prime is 129481921. The next prime is 129481949. The reversal of 129481945 is 549184921.

It is not a de Polignac number, because 129481945 - 2⁷ = 129481817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129481949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12211 + ... + 20200.

It is an arithmetic number, because the mean of its divisors is an integer number (10501488).

Almost surely, 2^129481945 is an apocalyptic number.

It is an amenable number.

129481945 is a deficient number, since it is larger than the sum of its proper divisors (38541863).

129481945 is a wasteful number, since it uses less digits than its factorization.

129481945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32480.

The product of its digits is 103680, while the sum is 43.

The square root of 129481945 is about 11379.0133579322. The cubic root of 129481945 is about 505.9058928656.

The spelling of 129481945 in words is "one hundred twenty-nine million, four hundred eighty-one thousand, nine hundred forty-five".