145580249 has 2 divisors, whose sum is σ = 145580250. Its totient is φ = 145580248.

The previous prime is 145580209. The next prime is 145580269. The reversal of 145580249 is 942085541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137053849 + 8526400 = 11707^2 + 2920^2 .

It is an emirp because it is prime and its reverse (942085541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145580249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145580209) 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, 72790124 + 72790125.

It is an arithmetic number, because the mean of its divisors is an integer number (72790125).

Almost surely, 2^145580249 is an apocalyptic number.

It is an amenable number.

145580249 is a deficient number, since it is larger than the sum of its proper divisors (1).

145580249 is an equidigital number, since it uses as much as digits as its factorization.

145580249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 145580249 is about 12065.6640513484. The cubic root of 145580249 is about 526.0586336543.

The spelling of 145580249 in words is "one hundred forty-five million, five hundred eighty thousand, two hundred forty-nine".