13125551 has 2 divisors, whose sum is σ = 13125552. Its totient is φ = 13125550.

The previous prime is 13125527. The next prime is 13125569. The reversal of 13125551 is 15552131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13125551 - 2¹⁴ = 13109167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13125251) 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, 6562775 + 6562776.

It is an arithmetic number, because the mean of its divisors is an integer number (6562776).

Almost surely, 2^13125551 is an apocalyptic number.

13125551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13125551 is an equidigital number, since it uses as much as digits as its factorization.

13125551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 750, while the sum is 23.

The square root of 13125551 is about 3622.9202309739. The cubic root of 13125551 is about 235.8879998577.

Adding to 13125551 its reverse (15552131), we get a palindrome (28677682).

The spelling of 13125551 in words is "thirteen million, one hundred twenty-five thousand, five hundred fifty-one".