145971 has 18 divisors (see below), whose sum is σ = 246012. Its totient is φ = 83160.

The previous prime is 145969. The next prime is 145987. The reversal of 145971 is 179541.

145971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145971 - 2¹ = 145969 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (145931) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 276 + ... + 606.

2¹⁴⁵⁹⁷¹ is an apocalyptic number.

145971 is a deficient number, since it is larger than the sum of its proper divisors (100041).

145971 is a wasteful number, since it uses less digits than its factorization.

145971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 341 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 145971 is about 382.0615133719. The cubic root of 145971 is about 52.6528876699.

The spelling of 145971 in words is "one hundred forty-five thousand, nine hundred seventy-one".