129741772 has 12 divisors (see below), whose sum is σ = 229296816. Its totient is φ = 64228400.

The previous prime is 129741763. The next prime is 129741811. The reversal of 129741772 is 277147921.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160168 + ... + 160975.

It is an arithmetic number, because the mean of its divisors is an integer number (19108068).

Almost surely, 2^129741772 is an apocalyptic number.

It is an amenable number.

129741772 is a deficient number, since it is larger than the sum of its proper divisors (99555044).

129741772 is a wasteful number, since it uses less digits than its factorization.

129741772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321248 (or 321246 counting only the distinct ones).

The product of its digits is 49392, while the sum is 40.

The square root of 129741772 is about 11390.4245750543. The cubic root of 129741772 is about 506.2440614657.

The spelling of 129741772 in words is "one hundred twenty-nine million, seven hundred forty-one thousand, seven hundred seventy-two".