145919 has 4 divisors (see below), whose sum is σ = 149520. Its totient is φ = 142320.

The previous prime is 145903. The next prime is 145931. The reversal of 145919 is 919541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919541 = 7 ⋅131363.

It is a cyclic number.

It is not a de Polignac number, because 145919 - 2⁴ = 145903 is a prime.

It is a super-2 number, since 2×145919² = 42584709122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 145891 and 145900.

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 145919.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739 + ... + 1820.

It is an arithmetic number, because the mean of its divisors is an integer number (37380).

2¹⁴⁵⁹¹⁹ is an apocalyptic number.

145919 is a deficient number, since it is larger than the sum of its proper divisors (3601).

145919 is an equidigital number, since it uses as much as digits as its factorization.

145919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600.

The product of its digits is 1620, while the sum is 29.

The square root of 145919 is about 381.9934554413. The cubic root of 145919 is about 52.6466346577.

The spelling of 145919 in words is "one hundred forty-five thousand, nine hundred nineteen".