171256425 has 12 divisors (see below), whose sum is σ = 283144080. Its totient is φ = 91336720.

The previous prime is 171256417. The next prime is 171256441. The reversal of 171256425 is 524652171.

It is not a de Polignac number, because 171256425 - 2³ = 171256417 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1141635 + ... + 1141784.

It is an arithmetic number, because the mean of its divisors is an integer number (23595340).

Almost surely, 2^171256425 is an apocalyptic number.

171256425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

171256425 is a deficient number, since it is larger than the sum of its proper divisors (111887655).

171256425 is a wasteful number, since it uses less digits than its factorization.

171256425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283432 (or 2283427 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 171256425 is about 13086.4978126312. The cubic root of 171256425 is about 555.3272155327.

The spelling of 171256425 in words is "one hundred seventy-one million, two hundred fifty-six thousand, four hundred twenty-five".