145725178 has 4 divisors (see below), whose sum is σ = 218587770. Its totient is φ = 72862588.

The previous prime is 145725163. The next prime is 145725179. The reversal of 145725178 is 871527541.

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

It can be written as a sum of positive squares in only one way, i.e., 128527569 + 17197609 = 11337^2 + 4147^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145725178.

It is not an unprimeable number, because it can be changed into a prime (145725179) 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 as a sum of consecutive naturals, namely, 36431293 + ... + 36431296.

Almost surely, 2^145725178 is an apocalyptic number.

145725178 is a deficient number, since it is larger than the sum of its proper divisors (72862592).

145725178 is an equidigital number, since it uses as much as digits as its factorization.

145725178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72862591.

The product of its digits is 78400, while the sum is 40.

The square root of 145725178 is about 12071.6684016751. The cubic root of 145725178 is about 526.2331441990.

The spelling of 145725178 in words is "one hundred forty-five million, seven hundred twenty-five thousand, one hundred seventy-eight".