145840243 has 2 divisors, whose sum is σ = 145840244. Its totient is φ = 145840242.

The previous prime is 145840237. The next prime is 145840301. The reversal of 145840243 is 342048541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145840243 - 2¹³ = 145832051 is a prime.

It is not a weakly prime, because it can be changed into another prime (145840543) by changing a digit.

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 as a sum of consecutive naturals, namely, 72920121 + 72920122.

It is an arithmetic number, because the mean of its divisors is an integer number (72920122).

Almost surely, 2^145840243 is an apocalyptic number.

145840243 is a deficient number, since it is larger than the sum of its proper divisors (1).

145840243 is an equidigital number, since it uses as much as digits as its factorization.

145840243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 145840243 is about 12076.4333724821. The cubic root of 145840243 is about 526.3716128047.

Adding to 145840243 its reverse (342048541), we get a palindrome (487888784).

The spelling of 145840243 in words is "one hundred forty-five million, eight hundred forty thousand, two hundred forty-three".