172543425 has 24 divisors (see below), whose sum is σ = 289538016. Its totient is φ = 90647040.

The previous prime is 172543411. The next prime is 172543529. The reversal of 172543425 is 524345271.

It is not a de Polignac number, because 172543425 - 2²³ = 164154817 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12144 + ... + 22193.

It is an arithmetic number, because the mean of its divisors is an integer number (12064084).

Almost surely, 2^172543425 is an apocalyptic number.

172543425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172543425 is a deficient number, since it is larger than the sum of its proper divisors (116994591).

172543425 is a wasteful number, since it uses less digits than its factorization.

172543425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34417 (or 34412 counting only the distinct ones).

The product of its digits is 33600, while the sum is 33.

The square root of 172543425 is about 13135.5785940323. The cubic root of 172543425 is about 556.7148485592.

Adding to 172543425 its reverse (524345271), we get a palindrome (696888696).

It can be divided in two parts, 1725 and 43425, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 172543425 in words is "one hundred seventy-two million, five hundred forty-three thousand, four hundred twenty-five".