12148561 has 2 divisors, whose sum is σ = 12148562. Its totient is φ = 12148560.

The previous prime is 12148537. The next prime is 12148567. The reversal of 12148561 is 16584121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8088336 + 4060225 = 2844^2 + 2015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12148561 is a prime.

It is not a weakly prime, because it can be changed into another prime (12148567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6074280 + 6074281.

It is an arithmetic number, because the mean of its divisors is an integer number (6074281).

Almost surely, 2^12148561 is an apocalyptic number.

It is an amenable number.

12148561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12148561 is an equidigital number, since it uses as much as digits as its factorization.

12148561 is an evil number, because the sum of its binary digits is even.

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

The square root of 12148561 is about 3485.4785898066. The cubic root of 12148561 is about 229.8837534809.

The spelling of 12148561 in words is "twelve million, one hundred forty-eight thousand, five hundred sixty-one".