1251125451245 has 16 divisors (see below), whose sum is σ = 1546791780528. Its totient is φ = 970776875520.

The previous prime is 1251125451193. The next prime is 1251125451263. The reversal of 1251125451245 is 5421545211521.

It can be written as a sum of positive squares in 8 ways, for example, as 9688268041 + 1241437183204 = 98429^2 + 1114198^2 .

It is not a de Polignac number, because 1251125451245 - 2²² = 1251121256941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1251125451199 and 1251125451208.

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, 10608296 + ... + 10725585.

It is an arithmetic number, because the mean of its divisors is an integer number (96674486283).

Almost surely, 2^{1251125451245} is an apocalyptic number.

It is an amenable number.

1251125451245 is a deficient number, since it is larger than the sum of its proper divisors (295666329283).

1251125451245 is a wasteful number, since it uses less digits than its factorization.

1251125451245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21334240.

The product of its digits is 80000, while the sum is 38.

The spelling of 1251125451245 in words is "one trillion, two hundred fifty-one billion, one hundred twenty-five million, four hundred fifty-one thousand, two hundred forty-five".