12551603 has 2 divisors, whose sum is σ = 12551604. Its totient is φ = 12551602.

The previous prime is 12551597. The next prime is 12551639. The reversal of 12551603 is 30615521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12551603 - 2⁴ = 12551587 is a prime.

It is not a weakly prime, because it can be changed into another prime (12551653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275801 + 6275802.

It is an arithmetic number, because the mean of its divisors is an integer number (6275802).

Almost surely, 2^12551603 is an apocalyptic number.

12551603 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551603 is an equidigital number, since it uses as much as digits as its factorization.

12551603 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12551603 is about 3542.8241559524. The cubic root of 12551603 is about 232.3983630991.

The spelling of 12551603 in words is "twelve million, five hundred fifty-one thousand, six hundred three".