125218013 has 2 divisors, whose sum is σ = 125218014. Its totient is φ = 125218012.

The previous prime is 125217997. The next prime is 125218061. The reversal of 125218013 is 310812521.

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., 115842169 + 9375844 = 10763^2 + 3062^2 .

It is an emirp because it is prime and its reverse (310812521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125218013 - 2⁴ = 125217997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125218013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125214013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62609006 + 62609007.

It is an arithmetic number, because the mean of its divisors is an integer number (62609007).

Almost surely, 2^125218013 is an apocalyptic number.

It is an amenable number.

125218013 is a deficient number, since it is larger than the sum of its proper divisors (1).

125218013 is an equidigital number, since it uses as much as digits as its factorization.

125218013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 125218013 is about 11190.0854777790. The cubic root of 125218013 is about 500.2905151692.

The spelling of 125218013 in words is "one hundred twenty-five million, two hundred eighteen thousand, thirteen".