145438 has 4 divisors (see below), whose sum is σ = 218160. Its totient is φ = 72718.

The previous prime is 145433. The next prime is 145441. The reversal of 145438 is 834541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834541 = 61 ⋅13681.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 36358 + ... + 36361.

It is an arithmetic number, because the mean of its divisors is an integer number (54540).

2¹⁴⁵⁴³⁸ is an apocalyptic number.

145438 is a deficient number, since it is larger than the sum of its proper divisors (72722).

145438 is an equidigital number, since it uses as much as digits as its factorization.

145438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72721.

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

The square root of 145438 is about 381.3633438075. The cubic root of 145438 is about 52.5887237463.

Adding to 145438 its reverse (834541), we get a palindrome (979979).

The spelling of 145438 in words is "one hundred forty-five thousand, four hundred thirty-eight".