145372271 has 4 divisors (see below), whose sum is σ = 158587944. Its totient is φ = 132156600.

The previous prime is 145372231. The next prime is 145372291. The reversal of 145372271 is 172273541.

145372271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145372271 - 2¹⁴ = 145355887 is a prime.

It is a super-2 number, since 2×145372271² = 42266194351394882, 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 (145372231) 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, 6607820 + ... + 6607841.

It is an arithmetic number, because the mean of its divisors is an integer number (39646986).

Almost surely, 2^145372271 is an apocalyptic number.

145372271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145372271 is a deficient number, since it is larger than the sum of its proper divisors (13215673).

145372271 is a wasteful number, since it uses less digits than its factorization.

145372271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13215672.

The product of its digits is 11760, while the sum is 32.

The square root of 145372271 is about 12057.0423819443. The cubic root of 145372271 is about 525.8080026665.

The spelling of 145372271 in words is "one hundred forty-five million, three hundred seventy-two thousand, two hundred seventy-one".