145278805 has 8 divisors (see below), whose sum is σ = 199239552. Its totient is φ = 99619728.

The previous prime is 145278799. The next prime is 145278823. The reversal of 145278805 is 508872541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145278805 - 2¹⁵ = 145246037 is a prime.

It is a super-3 number, since 3×145278805³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2075377 + ... + 2075446.

It is an arithmetic number, because the mean of its divisors is an integer number (24904944).

Almost surely, 2^145278805 is an apocalyptic number.

It is an amenable number.

145278805 is a deficient number, since it is larger than the sum of its proper divisors (53960747).

145278805 is an equidigital number, since it uses as much as digits as its factorization.

145278805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150835.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 145278805 is about 12053.1657667187. The cubic root of 145278805 is about 525.6952904170.

It can be divided in two parts, 14527 and 8805, that added together give a palindrome (23332).

The spelling of 145278805 in words is "one hundred forty-five million, two hundred seventy-eight thousand, eight hundred five".