129740544 has 54 divisors (see below), whose sum is σ = 374080616. Its totient is φ = 43246080.

The previous prime is 129740521. The next prime is 129740557. The reversal of 129740544 is 445047921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 129740499 and 129740508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25852 + ... + 30459.

Almost surely, 2^129740544 is an apocalyptic number.

It is an amenable number.

129740544 is an abundant number, since it is smaller than the sum of its proper divisors (244340072).

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

129740544 is an equidigital number, since it uses as much as digits as its factorization.

129740544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56333 (or 56316 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 129740544 is about 11390.3706700002. The cubic root of 129740544 is about 506.2424642683.

The spelling of 129740544 in words is "one hundred twenty-nine million, seven hundred forty thousand, five hundred forty-four".