1251351350525 has 6 divisors (see below), whose sum is σ = 1551675674682. Its totient is φ = 1001081080400.

The previous prime is 1251351350521. The next prime is 1251351350533. The reversal of 1251351350525 is 5250531531521.

It can be written as a sum of positive squares in 3 ways, for example, as 12105940729 + 1239245409796 = 110027^2 + 1113214^2 .

It is not a de Polignac number, because 1251351350525 - 2² = 1251351350521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251351350521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25027026986 + ... + 25027027035.

It is an arithmetic number, because the mean of its divisors is an integer number (258612612447).

Almost surely, 2^{1251351350525} is an apocalyptic number.

It is an amenable number.

1251351350525 is a deficient number, since it is larger than the sum of its proper divisors (300324324157).

1251351350525 is an equidigital number, since it uses as much as digits as its factorization.

1251351350525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50054054031 (or 50054054026 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 1251351350525 in words is "one trillion, two hundred fifty-one billion, three hundred fifty-one million, three hundred fifty thousand, five hundred twenty-five".