172433121 has 16 divisors (see below), whose sum is σ = 263699328. Its totient is φ = 98179200.

The previous prime is 172433099. The next prime is 172433147. The reversal of 172433121 is 121334271.

It is a happy number.

172433121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172433121 - 2⁷ = 172432993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172433091 and 172433100.

It is not an unprimeable number, because it can be changed into a prime (172433171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8710 + ... + 20511.

It is an arithmetic number, because the mean of its divisors is an integer number (16481208).

Almost surely, 2^172433121 is an apocalyptic number.

It is an amenable number.

172433121 is a deficient number, since it is larger than the sum of its proper divisors (91266207).

172433121 is a wasteful number, since it uses less digits than its factorization.

172433121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29512.

The product of its digits is 1008, while the sum is 24.

The square root of 172433121 is about 13131.3792497209. The cubic root of 172433121 is about 556.5961905751.

Adding to 172433121 its reverse (121334271), we get a palindrome (293767392).

The spelling of 172433121 in words is "one hundred seventy-two million, four hundred thirty-three thousand, one hundred twenty-one".