145778 has 4 divisors (see below), whose sum is σ = 218670. Its totient is φ = 72888.

The previous prime is 145777. The next prime is 145799. The reversal of 145778 is 877541.

145778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 94249 + 51529 = 307^2 + 227^2 .

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (145771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36443 + ... + 36446.

2¹⁴⁵⁷⁷⁸ is an apocalyptic number.

145778 is a deficient number, since it is larger than the sum of its proper divisors (72892).

145778 is an equidigital number, since it uses as much as digits as its factorization.

145778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72891.

The product of its digits is 7840, while the sum is 32.

The square root of 145778 is about 381.8088526999. The cubic root of 145778 is about 52.6296718958.

The spelling of 145778 in words is "one hundred forty-five thousand, seven hundred seventy-eight".