148012561 has 2 divisors, whose sum is σ = 148012562. Its totient is φ = 148012560.

The previous prime is 148012463. The next prime is 148012573. The reversal of 148012561 is 165210841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139712400 + 8300161 = 11820^2 + 2881^2 .

It is an emirp because it is prime and its reverse (165210841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148012561 - 2⁹ = 148012049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (148018561) 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, 74006280 + 74006281.

It is an arithmetic number, because the mean of its divisors is an integer number (74006281).

Almost surely, 2^148012561 is an apocalyptic number.

It is an amenable number.

148012561 is a deficient number, since it is larger than the sum of its proper divisors (1).

148012561 is an equidigital number, since it uses as much as digits as its factorization.

148012561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 148012561 is about 12166.0413035630. The cubic root of 148012561 is about 528.9722113325.

It can be divided in two parts, 1480 and 12561, that added together give a palindrome (14041).

The spelling of 148012561 in words is "one hundred forty-eight million, twelve thousand, five hundred sixty-one".