145422019 has 4 divisors (see below), whose sum is σ = 145582560. Its totient is φ = 145261480.

The previous prime is 145422007. The next prime is 145422049. The reversal of 145422019 is 910224541.

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 145422019 - 2⁷ = 145421891 is a prime.

It is a super-2 number, since 2×145422019² = 42295127220072722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145422049) 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, 78904 + ... + 80725.

It is an arithmetic number, because the mean of its divisors is an integer number (36395640).

Almost surely, 2^145422019 is an apocalyptic number.

145422019 is a deficient number, since it is larger than the sum of its proper divisors (160541).

145422019 is an equidigital number, since it uses as much as digits as its factorization.

145422019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160540.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 145422019 is about 12059.1052321472. The cubic root of 145422019 is about 525.8679749319.

It can be divided in two parts, 14542 and 2019, that added together give a palindrome (16561).

The spelling of 145422019 in words is "one hundred forty-five million, four hundred twenty-two thousand, nineteen".