172005425 has 12 divisors (see below), whose sum is σ = 213451740. Its totient is φ = 137497920.

The previous prime is 172005413. The next prime is 172005433. The reversal of 172005425 is 524500271.

It can be written as a sum of positive squares in 6 ways, for example, as 185761 + 171819664 = 431^2 + 13108^2 .

It is not a de Polignac number, because 172005425 - 2¹⁰ = 172004401 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 172005394 and 172005403.

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, 53771 + ... + 56879.

It is an arithmetic number, because the mean of its divisors is an integer number (17787645).

Almost surely, 2^172005425 is an apocalyptic number.

It is an amenable number.

172005425 is a deficient number, since it is larger than the sum of its proper divisors (41446315).

172005425 is a wasteful number, since it uses less digits than its factorization.

172005425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332 (or 5327 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 172005425 is about 13115.0838731592. The cubic root of 172005425 is about 556.1356234977.

Adding to 172005425 its reverse (524500271), we get a palindrome (696505696).

The spelling of 172005425 in words is "one hundred seventy-two million, five thousand, four hundred twenty-five".