145247227 has 2 divisors, whose sum is σ = 145247228. Its totient is φ = 145247226.

The previous prime is 145247213. The next prime is 145247243. The reversal of 145247227 is 722742541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145247227 - 2¹⁹ = 144722939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145247192 and 145247201.

It is not a weakly prime, because it can be changed into another prime (145247027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72623613 + 72623614.

It is an arithmetic number, because the mean of its divisors is an integer number (72623614).

Almost surely, 2^145247227 is an apocalyptic number.

145247227 is a deficient number, since it is larger than the sum of its proper divisors (1).

145247227 is an equidigital number, since it uses as much as digits as its factorization.

145247227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 34.

The square root of 145247227 is about 12051.8557492197. The cubic root of 145247227 is about 525.6571990410.

Adding to 145247227 its reverse (722742541), we get a palindrome (867989768).

The spelling of 145247227 in words is "one hundred forty-five million, two hundred forty-seven thousand, two hundred twenty-seven".