1251626113 has 2 divisors, whose sum is σ = 1251626114. Its totient is φ = 1251626112.

The previous prime is 1251626093. The next prime is 1251626119. The reversal of 1251626113 is 3116261521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 973003249 + 278622864 = 31193^2 + 16692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251626113 - 2¹³ = 1251617921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251626119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625813056 + 625813057.

It is an arithmetic number, because the mean of its divisors is an integer number (625813057).

Almost surely, 2^1251626113 is an apocalyptic number.

It is an amenable number.

1251626113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251626113 is an equidigital number, since it uses as much as digits as its factorization.

1251626113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 1251626113 is about 35378.3282957236. The cubic root of 1251626113 is about 1077.6842565085.

Adding to 1251626113 its reverse (3116261521), we get a palindrome (4367887634).

The spelling of 1251626113 in words is "one billion, two hundred fifty-one million, six hundred twenty-six thousand, one hundred thirteen".