145384 has 16 divisors (see below), whose sum is σ = 288900. Its totient is φ = 68352.

The previous prime is 145381. The next prime is 145391. The reversal of 145384 is 483541.

It can be written as a sum of positive squares in 2 ways, for example, as 142884 + 2500 = 378^2 + 50^2 .

It is a super-2 number, since 2×145384² = 42273014912, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (145381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399 + ... + 670.

2¹⁴⁵³⁸⁴ is an apocalyptic number.

It is an amenable number.

145384 is a deficient number, since it is larger than the sum of its proper divisors (143516).

145384 is a wasteful number, since it uses less digits than its factorization.

145384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092 (or 1088 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 145384 is about 381.2925386104. The cubic root of 145384 is about 52.5822143456.

It can be divided in two parts, 145 and 384, that added together give a square (529 = 23²).

The spelling of 145384 in words is "one hundred forty-five thousand, three hundred eighty-four".