15125813 has 2 divisors, whose sum is σ = 15125814. Its totient is φ = 15125812.

The previous prime is 15125783. The next prime is 15125839. The reversal of 15125813 is 31852151.

It is a happy number.

It is an a-pointer prime, because the next prime (15125839) can be obtained adding 15125813 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12229009 + 2896804 = 3497^2 + 1702^2 .

It is a cyclic number.

It is not a de Polignac number, because 15125813 - 2⁶ = 15125749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15122813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7562906 + 7562907.

It is an arithmetic number, because the mean of its divisors is an integer number (7562907).

Almost surely, 2^15125813 is an apocalyptic number.

It is an amenable number.

15125813 is a deficient number, since it is larger than the sum of its proper divisors (1).

15125813 is an equidigital number, since it uses as much as digits as its factorization.

15125813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 26.

The square root of 15125813 is about 3889.1918183602. The cubic root of 15125813 is about 247.3088031234.

Adding to 15125813 its reverse (31852151), we get a palindrome (46977964).

The spelling of 15125813 in words is "fifteen million, one hundred twenty-five thousand, eight hundred thirteen".