172145425 has 12 divisors (see below), whose sum is σ = 213630300. Its totient is φ = 137606720.

The previous prime is 172145419. The next prime is 172145459. The reversal of 172145425 is 524541271.

It can be written as a sum of positive squares in 6 ways, for example, as 6431296 + 165714129 = 2536^2 + 12873^2 .

It is not a de Polignac number, because 172145425 - 2⁹ = 172144913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46959 + ... + 50491.

It is an arithmetic number, because the mean of its divisors is an integer number (17802525).

Almost surely, 2^172145425 is an apocalyptic number.

It is an amenable number.

172145425 is a deficient number, since it is larger than the sum of its proper divisors (41484875).

172145425 is a wasteful number, since it uses less digits than its factorization.

172145425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5492 (or 5487 counting only the distinct ones).

The product of its digits is 11200, while the sum is 31.

The square root of 172145425 is about 13120.4201533335. The cubic root of 172145425 is about 556.2864673310.

Adding to 172145425 its reverse (524541271), we get a palindrome (696686696).

The spelling of 172145425 in words is "one hundred seventy-two million, one hundred forty-five thousand, four hundred twenty-five".