145985019 has 4 divisors (see below), whose sum is σ = 194646696. Its totient is φ = 97323344.

The previous prime is 145985011. The next prime is 145985023. The reversal of 145985019 is 910589541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145985019 - 2³ = 145985011 is a prime.

It is a super-3 number, since 3×145985019³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (145985011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24330834 + ... + 24330839.

It is an arithmetic number, because the mean of its divisors is an integer number (48661674).

Almost surely, 2^145985019 is an apocalyptic number.

145985019 is a deficient number, since it is larger than the sum of its proper divisors (48661677).

145985019 is an equidigital number, since it uses as much as digits as its factorization.

145985019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48661676.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 145985019 is about 12082.4260395005. The cubic root of 145985019 is about 526.5457320380.

The spelling of 145985019 in words is "one hundred forty-five million, nine hundred eighty-five thousand, nineteen".