125550013 has 2 divisors, whose sum is σ = 125550014. Its totient is φ = 125550012.

The previous prime is 125550011. The next prime is 125550037. The reversal of 125550013 is 310055521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89813529 + 35736484 = 9477^2 + 5978^2 .

It is a cyclic number.

It is not a de Polignac number, because 125550013 - 2¹ = 125550011 is a prime.

Together with 125550011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125550011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62775006 + 62775007.

It is an arithmetic number, because the mean of its divisors is an integer number (62775007).

Almost surely, 2^125550013 is an apocalyptic number.

It is an amenable number.

125550013 is a deficient number, since it is larger than the sum of its proper divisors (1).

125550013 is an equidigital number, since it uses as much as digits as its factorization.

125550013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 125550013 is about 11204.9102182927. The cubic root of 125550013 is about 500.7322776819.

The spelling of 125550013 in words is "one hundred twenty-five million, five hundred fifty thousand, thirteen".