12603551 has 2 divisors, whose sum is σ = 12603552. Its totient is φ = 12603550.

The previous prime is 12603533. The next prime is 12603583. The reversal of 12603551 is 15530621.

It is a weak prime.

It is an emirp because it is prime and its reverse (15530621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12603551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12606551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6301775 + 6301776.

It is an arithmetic number, because the mean of its divisors is an integer number (6301776).

Almost surely, 2^12603551 is an apocalyptic number.

12603551 is a deficient number, since it is larger than the sum of its proper divisors (1).

12603551 is an equidigital number, since it uses as much as digits as its factorization.

12603551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 12603551 is about 3550.1480250829. The cubic root of 12603551 is about 232.7185350363.

The spelling of 12603551 in words is "twelve million, six hundred three thousand, five hundred fifty-one".