145240201 has 2 divisors, whose sum is σ = 145240202. Its totient is φ = 145240200.

The previous prime is 145240187. The next prime is 145240217. The reversal of 145240201 is 102042541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75951225 + 69288976 = 8715^2 + 8324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145240201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145240801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72620100 + 72620101.

It is an arithmetic number, because the mean of its divisors is an integer number (72620101).

Almost surely, 2^145240201 is an apocalyptic number.

It is an amenable number.

145240201 is a deficient number, since it is larger than the sum of its proper divisors (1).

145240201 is an equidigital number, since it uses as much as digits as its factorization.

145240201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 145240201 is about 12051.5642553156. The cubic root of 145240201 is about 525.6487230856.

Adding to 145240201 its reverse (102042541), we get a palindrome (247282742).

The spelling of 145240201 in words is "one hundred forty-five million, two hundred forty thousand, two hundred one".