1251263131325 has 12 divisors (see below), whose sum is σ = 1551697771668. Its totient is φ = 1000925673600.

The previous prime is 1251263131273. The next prime is 1251263131351. The reversal of 1251263131325 is 5231313621521.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 44523532036 + 1206739599289 = 211006^2 + 1098517^2 .

It is not a de Polignac number, because 1251263131325 - 2¹⁰ = 1251263130301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1819046 + ... + 2410695.

It is an arithmetic number, because the mean of its divisors is an integer number (129308147639).

Almost surely, 2^{1251263131325} is an apocalyptic number.

It is an amenable number.

1251263131325 is a deficient number, since it is larger than the sum of its proper divisors (300434640343).

1251263131325 is a wasteful number, since it uses less digits than its factorization.

1251263131325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241584 (or 4241579 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

Adding to 1251263131325 its reverse (5231313621521), we get a palindrome (6482576752846).

The spelling of 1251263131325 in words is "one trillion, two hundred fifty-one billion, two hundred sixty-three million, one hundred thirty-one thousand, three hundred twenty-five".