171406225 has 6 divisors (see below), whose sum is σ = 212543750. Its totient is φ = 137124960.

The previous prime is 171406219. The next prime is 171406229. The reversal of 171406225 is 522604171.

It can be written as a sum of positive squares in 3 ways, for example, as 3211264 + 168194961 = 1792^2 + 12969^2 .

It is not a de Polignac number, because 171406225 - 2¹⁵ = 171373457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 171406193 and 171406202.

It is not an unprimeable number, because it can be changed into a prime (171406229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3428100 + ... + 3428149.

Almost surely, 2^171406225 is an apocalyptic number.

It is an amenable number.

171406225 is a deficient number, since it is larger than the sum of its proper divisors (41137525).

171406225 is an equidigital number, since it uses as much as digits as its factorization.

171406225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6856259 (or 6856254 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 171406225 is about 13092.2200180107. The cubic root of 171406225 is about 555.4890854178.

The spelling of 171406225 in words is "one hundred seventy-one million, four hundred six thousand, two hundred twenty-five".