129522742 has 8 divisors (see below), whose sum is σ = 196287336. Its totient is φ = 64093632.

The previous prime is 129522739. The next prime is 129522749. The reversal of 129522742 is 247225921.

It is a happy number.

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

It is a super-2 number, since 2×129522742² = 33552281390397128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129522698 and 129522707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129522749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333628 + ... + 334015.

It is an arithmetic number, because the mean of its divisors is an integer number (24535917).

Almost surely, 2^129522742 is an apocalyptic number.

129522742 is a deficient number, since it is larger than the sum of its proper divisors (66764594).

129522742 is an equidigital number, since it uses as much as digits as its factorization.

129522742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667742.

The product of its digits is 20160, while the sum is 34.

The square root of 129522742 is about 11380.8058589891. The cubic root of 129522742 is about 505.9590206727.

The spelling of 129522742 in words is "one hundred twenty-nine million, five hundred twenty-two thousand, seven hundred forty-two".