1251325161245 has 32 divisors (see below), whose sum is σ = 1528033476960. Its totient is φ = 983541657600.

The previous prime is 1251325161227. The next prime is 1251325161269. The reversal of 1251325161245 is 5421615231521.

It can be written as a sum of positive squares in 16 ways, for example, as 473748630436 + 777576530809 = 688294^2 + 881803^2 .

It is not a de Polignac number, because 1251325161245 - 2¹² = 1251325157149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1251325161199 and 1251325161208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219952361 + ... + 219958049.

It is an arithmetic number, because the mean of its divisors is an integer number (47751046155).

Almost surely, 2^{1251325161245} is an apocalyptic number.

It is an amenable number.

1251325161245 is a deficient number, since it is larger than the sum of its proper divisors (276708315715).

1251325161245 is a wasteful number, since it uses less digits than its factorization.

1251325161245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7985.

The product of its digits is 72000, while the sum is 38.

The spelling of 1251325161245 in words is "one trillion, two hundred fifty-one billion, three hundred twenty-five million, one hundred sixty-one thousand, two hundred forty-five".