145945 has 12 divisors (see below), whose sum is σ = 187884. Its totient is φ = 108800.

The previous prime is 145933. The next prime is 145949. The reversal of 145945 is 549541.

It can be written as a sum of positive squares in 6 ways, for example, as 35721 + 110224 = 189^2 + 332^2 .

It is not a de Polignac number, because 145945 - 2⁹ = 145433 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1395 + ... + 1495.

It is an arithmetic number, because the mean of its divisors is an integer number (15657).

2¹⁴⁵⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

145945 is a deficient number, since it is larger than the sum of its proper divisors (41939).

145945 is a wasteful number, since it uses less digits than its factorization.

145945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 123 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 145945 is about 382.0274859222. The cubic root of 145945 is about 52.6497613495.

The spelling of 145945 in words is "one hundred forty-five thousand, nine hundred forty-five".