171478945 has 8 divisors (see below), whose sum is σ = 224481600. Its totient is φ = 124711920.

The previous prime is 171478907. The next prime is 171478973. The reversal of 171478945 is 549874171.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 171478945 - 2⁷ = 171478817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 171478895 and 171478904.

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 7 ways as a sum of consecutive naturals, for example, 1558845 + ... + 1558954.

It is an arithmetic number, because the mean of its divisors is an integer number (28060200).

Almost surely, 2^171478945 is an apocalyptic number.

It is an amenable number.

171478945 is a deficient number, since it is larger than the sum of its proper divisors (53002655).

171478945 is a wasteful number, since it uses less digits than its factorization.

171478945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117815.

The product of its digits is 282240, while the sum is 46.

The square root of 171478945 is about 13094.9969453987. The cubic root of 171478945 is about 555.5676307079.

It can be divided in two parts, 1 and 71478945, that added together give a triangular number (71478946 = T₁₁₉₅₆).

The spelling of 171478945 in words is "one hundred seventy-one million, four hundred seventy-eight thousand, nine hundred forty-five".