145590019 has 4 divisors (see below), whose sum is σ = 146030200. Its totient is φ = 145149840.

The previous prime is 145590017. The next prime is 145590041. The reversal of 145590019 is 910095541.

It is a happy number.

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 145590019 - 2¹ = 145590017 is a prime.

It is a super-2 number, since 2×145590019² = 42392907264840722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145590017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219594 + ... + 220255.

It is an arithmetic number, because the mean of its divisors is an integer number (36507550).

Almost surely, 2^145590019 is an apocalyptic number.

145590019 is a deficient number, since it is larger than the sum of its proper divisors (440181).

145590019 is an equidigital number, since it uses as much as digits as its factorization.

145590019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440180.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 145590019 is about 12066.0689124503. The cubic root of 145590019 is about 526.0704014545.

The spelling of 145590019 in words is "one hundred forty-five million, five hundred ninety thousand, nineteen".