145019 has 4 divisors (see below), whose sum is σ = 165744. Its totient is φ = 124296.

The previous prime is 145009. The next prime is 145021. The reversal of 145019 is 910541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910541 = 349 ⋅2609.

It is a cyclic number.

It is not a de Polignac number, because 145019 - 2⁸ = 144763 is a prime.

It is a super-2 number, since 2×145019² = 42061020722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (145009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10352 + ... + 10365.

It is an arithmetic number, because the mean of its divisors is an integer number (41436).

2¹⁴⁵⁰¹⁹ is an apocalyptic number.

145019 is a deficient number, since it is larger than the sum of its proper divisors (20725).

145019 is an equidigital number, since it uses as much as digits as its factorization.

145019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20724.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 145019 is about 380.8136026982. The cubic root of 145019 is about 52.5381732953.

The spelling of 145019 in words is "one hundred forty-five thousand, nineteen".