129073741 has 4 divisors (see below), whose sum is σ = 136666332. Its totient is φ = 121481152.

The previous prime is 129073687. The next prime is 129073757. The reversal of 129073741 is 147370921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77951241 + 51122500 = 8829^2 + 7150^2 .

It is a cyclic number.

It is not a de Polignac number, because 129073741 - 2⁷ = 129073613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129073697 and 129073706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129073771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3796270 + ... + 3796303.

It is an arithmetic number, because the mean of its divisors is an integer number (34166583).

Almost surely, 2^129073741 is an apocalyptic number.

It is an amenable number.

129073741 is a deficient number, since it is larger than the sum of its proper divisors (7592591).

129073741 is an equidigital number, since it uses as much as digits as its factorization.

129073741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7592590.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 129073741 is about 11361.0624943268. The cubic root of 129073741 is about 505.3736945811.

The spelling of 129073741 in words is "one hundred twenty-nine million, seventy-three thousand, seven hundred forty-one".