145120013 has 2 divisors, whose sum is σ = 145120014. Its totient is φ = 145120012.

The previous prime is 145119991. The next prime is 145120049. The reversal of 145120013 is 310021541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111049444 + 34070569 = 10538^2 + 5837^2 .

It is a cyclic number.

It is not a de Polignac number, because 145120013 - 2⁸ = 145119757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145119973 and 145120000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145120813) 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, 72560006 + 72560007.

It is an arithmetic number, because the mean of its divisors is an integer number (72560007).

Almost surely, 2^145120013 is an apocalyptic number.

It is an amenable number.

145120013 is a deficient number, since it is larger than the sum of its proper divisors (1).

145120013 is an equidigital number, since it uses as much as digits as its factorization.

145120013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 145120013 is about 12046.5768166729. The cubic root of 145120013 is about 525.5036895416.

Adding to 145120013 its reverse (310021541), we get a palindrome (455141554).

The spelling of 145120013 in words is "one hundred forty-five million, one hundred twenty thousand, thirteen".