1251268905481 has 8 divisors (see below), whose sum is σ = 1450162756224. Its totient is φ = 1057410342240.

The previous prime is 1251268905463. The next prime is 1251268905517. The reversal of 1251268905481 is 1845098621521.

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

It is not a de Polignac number, because 1251268905481 - 2⁷ = 1251268905353 is a prime.

It is a super-2 number, since 2×1251268905481² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1251238905481) 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, 1258821340 + ... + 1258822333.

It is an arithmetic number, because the mean of its divisors is an integer number (181270344528).

Almost surely, 2^{1251268905481} is an apocalyptic number.

It is an amenable number.

1251268905481 is a deficient number, since it is larger than the sum of its proper divisors (198893850743).

1251268905481 is an equidigital number, since it uses as much as digits as its factorization.

1251268905481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517643751.

The product of its (nonzero) digits is 1382400, while the sum is 52.

The spelling of 1251268905481 in words is "one trillion, two hundred fifty-one billion, two hundred sixty-eight million, nine hundred five thousand, four hundred eighty-one".