145120049 has 2 divisors, whose sum is σ = 145120050. Its totient is φ = 145120048.

The previous prime is 145120013. The next prime is 145120091. The reversal of 145120049 is 940021541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137639824 + 7480225 = 11732^2 + 2735^2 .

It is an emirp because it is prime and its reverse (940021541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145120049 - 2¹⁶ = 145054513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145120249) 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, 72560024 + 72560025.

It is an arithmetic number, because the mean of its divisors is an integer number (72560025).

Almost surely, 2^145120049 is an apocalyptic number.

It is an amenable number.

145120049 is a deficient number, since it is larger than the sum of its proper divisors (1).

145120049 is an equidigital number, since it uses as much as digits as its factorization.

145120049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 145120049 is about 12046.5783108732. The cubic root of 145120049 is about 525.5037329956.

The spelling of 145120049 in words is "one hundred forty-five million, one hundred twenty thousand, forty-nine".