172533121 has 2 divisors, whose sum is σ = 172533122. Its totient is φ = 172533120.

The previous prime is 172533089. The next prime is 172533131. The reversal of 172533121 is 121335271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147282496 + 25250625 = 12136^2 + 5025^2 .

It is a cyclic number.

It is not a de Polignac number, because 172533121 - 2⁵ = 172533089 is a prime.

It is not a weakly prime, because it can be changed into another prime (172533131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86266560 + 86266561.

It is an arithmetic number, because the mean of its divisors is an integer number (86266561).

Almost surely, 2^172533121 is an apocalyptic number.

It is an amenable number.

172533121 is a deficient number, since it is larger than the sum of its proper divisors (1).

172533121 is an equidigital number, since it uses as much as digits as its factorization.

172533121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 172533121 is about 13135.1863709656. The cubic root of 172533121 is about 556.7037663172.

Adding to 172533121 its reverse (121335271), we get a palindrome (293868392).

The spelling of 172533121 in words is "one hundred seventy-two million, five hundred thirty-three thousand, one hundred twenty-one".