145278271 has 8 divisors (see below), whose sum is σ = 147981600. Its totient is φ = 142585440.

The previous prime is 145278257. The next prime is 145278319. The reversal of 145278271 is 172872541.

145278271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145278271 - 2²³ = 136889663 is a prime.

It is a super-2 number, since 2×145278271² = 42211552049498882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145278271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145278571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28710 + ... + 33388.

It is an arithmetic number, because the mean of its divisors is an integer number (18497700).

Almost surely, 2^145278271 is an apocalyptic number.

145278271 is a deficient number, since it is larger than the sum of its proper divisors (2703329).

145278271 is an equidigital number, since it uses as much as digits as its factorization.

145278271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249.

The product of its digits is 31360, while the sum is 37.

The square root of 145278271 is about 12053.1436148417. The cubic root of 145278271 is about 525.6946463184.

The spelling of 145278271 in words is "one hundred forty-five million, two hundred seventy-eight thousand, two hundred seventy-one".