129007641 has 24 divisors (see below), whose sum is σ = 205510080. Its totient is φ = 71723232.

The previous prime is 129007609. The next prime is 129007649. The reversal of 129007641 is 146700921.

It is a happy number.

It is not a de Polignac number, because 129007641 - 2⁵ = 129007609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129007599 and 129007608.

It is not an unprimeable number, because it can be changed into a prime (129007649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6421 + ... + 17298.

It is an arithmetic number, because the mean of its divisors is an integer number (8562920).

Almost surely, 2^129007641 is an apocalyptic number.

It is an amenable number.

129007641 is a deficient number, since it is larger than the sum of its proper divisors (76502439).

129007641 is a wasteful number, since it uses less digits than its factorization.

129007641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23773 (or 23766 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 129007641 is about 11358.1530628883. The cubic root of 129007641 is about 505.2874108156.

The spelling of 129007641 in words is "one hundred twenty-nine million, seven thousand, six hundred forty-one".