145250321 has 2 divisors, whose sum is σ = 145250322. Its totient is φ = 145250320.

The previous prime is 145250297. The next prime is 145250341. The reversal of 145250321 is 123052541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119596096 + 25654225 = 10936^2 + 5065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145250321 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (145250341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72625160 + 72625161.

It is an arithmetic number, because the mean of its divisors is an integer number (72625161).

Almost surely, 2^145250321 is an apocalyptic number.

It is an amenable number.

145250321 is a deficient number, since it is larger than the sum of its proper divisors (1).

145250321 is an equidigital number, since it uses as much as digits as its factorization.

145250321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 145250321 is about 12051.9841105106. The cubic root of 145250321 is about 525.6609314629.

The spelling of 145250321 in words is "one hundred forty-five million, two hundred fifty thousand, three hundred twenty-one".