145981171 has 8 divisors (see below), whose sum is σ = 167529824. Its totient is φ = 124606080.

The previous prime is 145981153. The next prime is 145981211. The reversal of 145981171 is 171189541.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 145981171 - 2²⁷ = 11763443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145981171.

It is not an unprimeable number, because it can be changed into a prime (145981151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41580 + ... + 44953.

It is an arithmetic number, because the mean of its divisors is an integer number (20941228).

Almost surely, 2^145981171 is an apocalyptic number.

145981171 is a deficient number, since it is larger than the sum of its proper divisors (21548653).

145981171 is an equidigital number, since it uses as much as digits as its factorization.

145981171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86781.

The product of its digits is 10080, while the sum is 37.

The square root of 145981171 is about 12082.2667989082. The cubic root of 145981171 is about 526.5411056140.

The spelling of 145981171 in words is "one hundred forty-five million, nine hundred eighty-one thousand, one hundred seventy-one".