9975129 has 4 divisors (see below), whose sum is σ = 13300176. Its totient is φ = 6650084.

The previous prime is 9975109. The next prime is 9975131. The reversal of 9975129 is 9215799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9975129 - 2¹² = 9971033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9975109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662519 + ... + 1662524.

It is an arithmetic number, because the mean of its divisors is an integer number (3325044).

Almost surely, 2^9975129 is an apocalyptic number.

It is an amenable number.

9975129 is a deficient number, since it is larger than the sum of its proper divisors (3325047).

9975129 is a wasteful number, since it uses less digits than its factorization.

9975129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325046.

The product of its digits is 51030, while the sum is 42.

The square root of 9975129 is about 3158.3427616394. The cubic root of 9975129 is about 215.2647109075.

The spelling of 9975129 in words is "nine million, nine hundred seventy-five thousand, one hundred twenty-nine".