7172129 has 4 divisors (see below), whose sum is σ = 7403520. Its totient is φ = 6940740.

The previous prime is 7172107. The next prime is 7172131. The reversal of 7172129 is 9212717.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9212717 = 1907 ⋅4831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7172129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7172189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115649 + ... + 115710.

It is an arithmetic number, because the mean of its divisors is an integer number (1850880).

Almost surely, 2^7172129 is an apocalyptic number.

It is an amenable number.

7172129 is a deficient number, since it is larger than the sum of its proper divisors (231391).

7172129 is a wasteful number, since it uses less digits than its factorization.

7172129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231390.

The product of its digits is 1764, while the sum is 29.

The square root of 7172129 is about 2678.0830831025. The cubic root of 7172129 is about 192.8483958931.

The spelling of 7172129 in words is "seven million, one hundred seventy-two thousand, one hundred twenty-nine".