129240969001 has 3 divisors (see below), whose sum is σ = 129241328503. Its totient is φ = 129240609500.

The previous prime is 129240968977. The next prime is 129240969017. The reversal of 129240969001 is 100969042921.

The square root of 129240969001 is 359501.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 121486405401 + 7754563600 = 348549^2 + 88060^2 .

It is not a de Polignac number, because 129240969001 - 2²¹ = 129238871849 is a prime.

It is a super-3 number, since 3×129240969001³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129240969061) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 179751 + ... + 539251.

Almost surely, 2^129240969001 is an apocalyptic number.

129240969001 is the 359501-st square number.

129240969001 is the 179751-st centered octagonal number.

It is an amenable number.

129240969001 is a deficient number, since it is larger than the sum of its proper divisors (359502).

129240969001 is an frugal number, since it uses more digits than its factorization.

129240969001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719002 (or 359501 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 129240969001 in words is "one hundred twenty-nine billion, two hundred forty million, nine hundred sixty-nine thousand, one".