125215313 has 2 divisors, whose sum is σ = 125215314. Its totient is φ = 125215312.

The previous prime is 125215303. The next prime is 125215327. The reversal of 125215313 is 313512521.

125215313 = 7912² + 7913².

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., 62615569 + 62599744 = 7913^2 + 7912^2 .

It is a cyclic number.

It is not a de Polignac number, because 125215313 - 2¹² = 125211217 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125215303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62607656 + 62607657.

It is an arithmetic number, because the mean of its divisors is an integer number (62607657).

Almost surely, 2^125215313 is an apocalyptic number.

125215313 is the 7913-rd centered square number.

It is an amenable number.

125215313 is a deficient number, since it is larger than the sum of its proper divisors (1).

125215313 is an equidigital number, since it uses as much as digits as its factorization.

125215313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 23.

The square root of 125215313 is about 11189.9648346186. The cubic root of 125215313 is about 500.2869193231.

Adding to 125215313 its reverse (313512521), we get a palindrome (438727834).

The spelling of 125215313 in words is "one hundred twenty-five million, two hundred fifteen thousand, three hundred thirteen".