145051391 has 2 divisors, whose sum is σ = 145051392. Its totient is φ = 145051390.

The previous prime is 145051369. The next prime is 145051451. The reversal of 145051391 is 193150541.

It is a weak prime.

It is an emirp because it is prime and its reverse (193150541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145051391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145051091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72525695 + 72525696.

It is an arithmetic number, because the mean of its divisors is an integer number (72525696).

Almost surely, 2^145051391 is an apocalyptic number.

145051391 is a deficient number, since it is larger than the sum of its proper divisors (1).

145051391 is an equidigital number, since it uses as much as digits as its factorization.

145051391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 145051391 is about 12043.7282848792. The cubic root of 145051391 is about 525.4208459261.

The spelling of 145051391 in words is "one hundred forty-five million, fifty-one thousand, three hundred ninety-one".