129325001 has 24 divisors (see below), whose sum is σ = 155731464. Its totient is φ = 106375680.

The previous prime is 129324973. The next prime is 129325013. The reversal of 129325001 is 100523921.

It can be written as a sum of positive squares in 4 ways, for example, as 28302400 + 101022601 = 5320^2 + 10051^2 .

It is a de Polignac number, because none of the positive numbers 2^k-129325001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129325081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78971 + ... + 80591.

It is an arithmetic number, because the mean of its divisors is an integer number (6488811).

Almost surely, 2^129325001 is an apocalyptic number.

It is an amenable number.

129325001 is a deficient number, since it is larger than the sum of its proper divisors (26406463).

129325001 is a wasteful number, since it uses less digits than its factorization.

129325001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 129325001 is about 11372.1150627313. The cubic root of 129325001 is about 505.7014087690.

Adding to 129325001 its reverse (100523921), we get a palindrome (229848922).

The spelling of 129325001 in words is "one hundred twenty-nine million, three hundred twenty-five thousand, one".