145515241 has 2 divisors, whose sum is σ = 145515242. Its totient is φ = 145515240.

The previous prime is 145515221. The next prime is 145515259. The reversal of 145515241 is 142515541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136539225 + 8976016 = 11685^2 + 2996^2 .

It is a cyclic number.

It is not a de Polignac number, because 145515241 - 2¹⁹ = 144990953 is a prime.

It is not a weakly prime, because it can be changed into another prime (145515211) 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, 72757620 + 72757621.

It is an arithmetic number, because the mean of its divisors is an integer number (72757621).

Almost surely, 2^145515241 is an apocalyptic number.

It is an amenable number.

145515241 is a deficient number, since it is larger than the sum of its proper divisors (1).

145515241 is an equidigital number, since it uses as much as digits as its factorization.

145515241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000, while the sum is 28.

The square root of 145515241 is about 12062.9698250472. The cubic root of 145515241 is about 525.9803192046.

The spelling of 145515241 in words is "one hundred forty-five million, five hundred fifteen thousand, two hundred forty-one".