145665259 has 2 divisors, whose sum is σ = 145665260. Its totient is φ = 145665258.

The previous prime is 145665257. The next prime is 145665269. The reversal of 145665259 is 952566541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145665259 - 2¹ = 145665257 is a prime.

Together with 145665257, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145665257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72832629 + 72832630.

It is an arithmetic number, because the mean of its divisors is an integer number (72832630).

Almost surely, 2^145665259 is an apocalyptic number.

145665259 is a deficient number, since it is larger than the sum of its proper divisors (1).

145665259 is an equidigital number, since it uses as much as digits as its factorization.

145665259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 43.

The square root of 145665259 is about 12069.1863437433. The cubic root of 145665259 is about 526.1610091320.

It can be divided in two parts, 145665 and 259, that added together give a square (145924 = 382²).

The spelling of 145665259 in words is "one hundred forty-five million, six hundred sixty-five thousand, two hundred fifty-nine".