125020013 has 2 divisors, whose sum is σ = 125020014. Its totient is φ = 125020012.

The previous prime is 125020001. The next prime is 125020037. The reversal of 125020013 is 310020521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73496329 + 51523684 = 8573^2 + 7178^2 .

It is a cyclic number.

It is not a de Polignac number, because 125020013 - 2⁸ = 125019757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 125020013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125020043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62510006 + 62510007.

It is an arithmetic number, because the mean of its divisors is an integer number (62510007).

Almost surely, 2^125020013 is an apocalyptic number.

It is an amenable number.

125020013 is a deficient number, since it is larger than the sum of its proper divisors (1).

125020013 is an equidigital number, since it uses as much as digits as its factorization.

125020013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 125020013 is about 11181.2348602469. The cubic root of 125020013 is about 500.0266825761.

Adding to 125020013 its reverse (310020521), we get a palindrome (435040534).

The spelling of 125020013 in words is "one hundred twenty-five million, twenty thousand, thirteen".