145439 has 8 divisors (see below), whose sum is σ = 168960. Its totient is φ = 122616.

The previous prime is 145433. The next prime is 145441. The reversal of 145439 is 934541.

145439 = 73² + 74² + ... + 93².

145439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145439 - 2⁴ = 145423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145439.

It is not an unprimeable number, because it can be changed into a prime (145433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422 + ... + 684.

It is an arithmetic number, because the mean of its divisors is an integer number (21120).

2¹⁴⁵⁴³⁹ is an apocalyptic number.

145439 is a deficient number, since it is larger than the sum of its proper divisors (23521).

145439 is an equidigital number, since it uses as much as digits as its factorization.

145439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its digits is 2160, while the sum is 26.

The square root of 145439 is about 381.3646548908. The cubic root of 145439 is about 52.5888442755.

The spelling of 145439 in words is "one hundred forty-five thousand, four hundred thirty-nine".