145774171 has 4 divisors (see below), whose sum is σ = 149164312. Its totient is φ = 142384032.

The previous prime is 145774169. The next prime is 145774177. The reversal of 145774171 is 171477541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145774171 - 2¹ = 145774169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145774171.

It is not an unprimeable number, because it can be changed into a prime (145774177) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1695006 + ... + 1695091.

It is an arithmetic number, because the mean of its divisors is an integer number (37291078).

Almost surely, 2^145774171 is an apocalyptic number.

145774171 is a deficient number, since it is larger than the sum of its proper divisors (3390141).

145774171 is an equidigital number, since it uses as much as digits as its factorization.

145774171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390140.

The product of its digits is 27440, while the sum is 37.

The square root of 145774171 is about 12073.6974866857. The cubic root of 145774171 is about 526.2921110205.

The spelling of 145774171 in words is "one hundred forty-five million, seven hundred seventy-four thousand, one hundred seventy-one".