172425571 has 4 divisors (see below), whose sum is σ = 176435512. Its totient is φ = 168415632.

The previous prime is 172425557. The next prime is 172425593. The reversal of 172425571 is 175524271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175524271 = 13 ⋅13501867.

It is a cyclic number.

It is not a de Polignac number, because 172425571 - 2⁷ = 172425443 is a prime.

It is a super-3 number, since 3×172425571³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172425511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2004906 + ... + 2004991.

It is an arithmetic number, because the mean of its divisors is an integer number (44108878).

Almost surely, 2^172425571 is an apocalyptic number.

172425571 is a deficient number, since it is larger than the sum of its proper divisors (4009941).

172425571 is an equidigital number, since it uses as much as digits as its factorization.

172425571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009940.

The product of its digits is 19600, while the sum is 34.

The square root of 172425571 is about 13131.0917672523. The cubic root of 172425571 is about 556.5880669181.

The spelling of 172425571 in words is "one hundred seventy-two million, four hundred twenty-five thousand, five hundred seventy-one".