145105445 has 4 divisors (see below), whose sum is σ = 174126540. Its totient is φ = 116084352.

The previous prime is 145105439. The next prime is 145105481. The reversal of 145105445 is 544501541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544501541 = 613 ⋅888257.

It can be written as a sum of positive squares in 2 ways, for example, as 92121604 + 52983841 = 9598^2 + 7279^2 .

It is a cyclic number.

It is not a de Polignac number, because 145105445 - 2⁸ = 145105189 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14510540 + ... + 14510549.

It is an arithmetic number, because the mean of its divisors is an integer number (43531635).

Almost surely, 2^145105445 is an apocalyptic number.

It is an amenable number.

145105445 is a deficient number, since it is larger than the sum of its proper divisors (29021095).

145105445 is an equidigital number, since it uses as much as digits as its factorization.

145105445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29021094.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 145105445 is about 12045.9721483988. The cubic root of 145105445 is about 525.4861045700.

Adding to 145105445 its reverse (544501541), we get a palindrome (689606986).

The spelling of 145105445 in words is "one hundred forty-five million, one hundred five thousand, four hundred forty-five".