145173471 has 8 divisors (see below), whose sum is σ = 203752320. Its totient is φ = 91688472.

The previous prime is 145173467. The next prime is 145173499. The reversal of 145173471 is 174371541.

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 145173471 - 2² = 145173467 is a prime.

It is a super-3 number, since 3×145173471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145173071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273395 + ... + 1273508.

It is an arithmetic number, because the mean of its divisors is an integer number (25469040).

Almost surely, 2^145173471 is an apocalyptic number.

145173471 is a deficient number, since it is larger than the sum of its proper divisors (58578849).

145173471 is a wasteful number, since it uses less digits than its factorization.

145173471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546925.

The product of its digits is 11760, while the sum is 33.

The square root of 145173471 is about 12048.7954169701. The cubic root of 145173471 is about 525.5682083880.

The spelling of 145173471 in words is "one hundred forty-five million, one hundred seventy-three thousand, four hundred seventy-one".