145442423 has 4 divisors (see below), whose sum is σ = 166219920. Its totient is φ = 124664928.

The previous prime is 145442399. The next prime is 145442431. The reversal of 145442423 is 324244541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324244541 = 11717 ⋅27673.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145442423 is a prime.

It is a super-2 number, since 2×145442423² = 42306996816221858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145442443) 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, 10388738 + ... + 10388751.

It is an arithmetic number, because the mean of its divisors is an integer number (41554980).

Almost surely, 2^145442423 is an apocalyptic number.

145442423 is a deficient number, since it is larger than the sum of its proper divisors (20777497).

145442423 is an equidigital number, since it uses as much as digits as its factorization.

145442423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20777496.

The product of its digits is 15360, while the sum is 29.

The square root of 145442423 is about 12059.9512022230. The cubic root of 145442423 is about 525.8925684298.

Adding to 145442423 its reverse (324244541), we get a palindrome (469686964).

The spelling of 145442423 in words is "one hundred forty-five million, four hundred forty-two thousand, four hundred twenty-three".