1251312440241 has 8 divisors (see below), whose sum is σ = 1668460701184. Its totient is φ = 834186236400.

The previous prime is 1251312440179. The next prime is 1251312440263. The reversal of 1251312440241 is 1420442131521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1251312440241 - 2¹⁵ = 1251312407473 is a prime.

It is a super-2 number, since 2×1251312440241² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1251312440199 and 1251312440208.

It is not an unprimeable number, because it can be changed into a prime (1251312442241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5381446 + ... + 5609151.

It is an arithmetic number, because the mean of its divisors is an integer number (208557587648).

Almost surely, 2^{1251312440241} is an apocalyptic number.

It is an amenable number.

1251312440241 is a deficient number, since it is larger than the sum of its proper divisors (417148260943).

1251312440241 is a wasteful number, since it uses less digits than its factorization.

1251312440241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11028551.

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 1251312440241 its reverse (1420442131521), we get a palindrome (2671754571762).

The spelling of 1251312440241 in words is "one trillion, two hundred fifty-one billion, three hundred twelve million, four hundred forty thousand, two hundred forty-one".