12154553 has 2 divisors, whose sum is σ = 12154554. Its totient is φ = 12154552.

The previous prime is 12154523. The next prime is 12154559. The reversal of 12154553 is 35545121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11854249 + 300304 = 3443^2 + 548^2 .

It is an emirp because it is prime and its reverse (35545121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12154553 - 2⁶ = 12154489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12154559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077276 + 6077277.

It is an arithmetic number, because the mean of its divisors is an integer number (6077277).

Almost surely, 2^12154553 is an apocalyptic number.

It is an amenable number.

12154553 is a deficient number, since it is larger than the sum of its proper divisors (1).

12154553 is an equidigital number, since it uses as much as digits as its factorization.

12154553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 26.

The square root of 12154553 is about 3486.3380501609. The cubic root of 12154553 is about 229.9215422376.

Adding to 12154553 its reverse (35545121), we get a palindrome (47699674).

The spelling of 12154553 in words is "twelve million, one hundred fifty-four thousand, five hundred fifty-three".