125013817 has 2 divisors, whose sum is σ = 125013818. Its totient is φ = 125013816.

The previous prime is 125013781. The next prime is 125013829. The reversal of 125013817 is 718310521.

Together with previous prime (125013781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79370281 + 45643536 = 8909^2 + 6756^2 .

It is an emirp because it is prime and its reverse (718310521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125013817 - 2¹⁹ = 124489529 is a prime.

It is not a weakly prime, because it can be changed into another prime (125013617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62506908 + 62506909.

It is an arithmetic number, because the mean of its divisors is an integer number (62506909).

Almost surely, 2^125013817 is an apocalyptic number.

It is an amenable number.

125013817 is a deficient number, since it is larger than the sum of its proper divisors (1).

125013817 is an equidigital number, since it uses as much as digits as its factorization.

125013817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 125013817 is about 11180.9577854493. The cubic root of 125013817 is about 500.0184219879.

The spelling of 125013817 in words is "one hundred twenty-five million, thirteen thousand, eight hundred seventeen".