145961239 has 2 divisors, whose sum is σ = 145961240. Its totient is φ = 145961238.

The previous prime is 145961209. The next prime is 145961267. The reversal of 145961239 is 932169541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145961239 - 2²⁵ = 112406807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145961209) 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, 72980619 + 72980620.

It is an arithmetic number, because the mean of its divisors is an integer number (72980620).

Almost surely, 2^145961239 is an apocalyptic number.

145961239 is a deficient number, since it is larger than the sum of its proper divisors (1).

145961239 is an equidigital number, since it uses as much as digits as its factorization.

145961239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 145961239 is about 12081.4419255319. The cubic root of 145961239 is about 526.5171402059.

The spelling of 145961239 in words is "one hundred forty-five million, nine hundred sixty-one thousand, two hundred thirty-nine".