1251333342125 has 16 divisors (see below), whose sum is σ = 1561754766000. Its totient is φ = 1001008497600.

The previous prime is 1251333342079. The next prime is 1251333342163. The reversal of 1251333342125 is 5212433331521.

It can be written as a sum of positive squares in 8 ways, for example, as 801406315369 + 449927026756 = 895213^2 + 670766^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1251333342125 is a prime.

It is a super-2 number, since 2×1251333342125² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1936619 + ... + 2500631.

It is an arithmetic number, because the mean of its divisors is an integer number (97609672875).

Almost surely, 2^{1251333342125} is an apocalyptic number.

It is an amenable number.

1251333342125 is a deficient number, since it is larger than the sum of its proper divisors (310421423875).

1251333342125 is an equidigital number, since it uses as much as digits as its factorization.

1251333342125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581777 (or 581767 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

Adding to 1251333342125 its reverse (5212433331521), we get a palindrome (6463766673646).

The spelling of 1251333342125 in words is "one trillion, two hundred fifty-one billion, three hundred thirty-three million, three hundred forty-two thousand, one hundred twenty-five".