145105243 has 2 divisors, whose sum is σ = 145105244. Its totient is φ = 145105242.

The previous prime is 145105199. The next prime is 145105271. The reversal of 145105243 is 342501541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145105243 is a prime.

It is not a weakly prime, because it can be changed into another prime (145105343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72552621 + 72552622.

It is an arithmetic number, because the mean of its divisors is an integer number (72552622).

Almost surely, 2^145105243 is an apocalyptic number.

145105243 is a deficient number, since it is larger than the sum of its proper divisors (1).

145105243 is an equidigital number, since it uses as much as digits as its factorization.

145105243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 145105243 is about 12045.9637638505. The cubic root of 145105243 is about 525.4858607284.

Adding to 145105243 its reverse (342501541), we get a palindrome (487606784).

The spelling of 145105243 in words is "one hundred forty-five million, one hundred five thousand, two hundred forty-three".