1249054523781 has 8 divisors (see below), whose sum is σ = 1665437735520. Its totient is φ = 832687163952.

The previous prime is 1249054523779. The next prime is 1249054523831. The reversal of 1249054523781 is 1873254509421.

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

It is not a de Polignac number, because 1249054523781 - 2¹ = 1249054523779 is a prime.

It is a super-4 number, since 4×1249054523781⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249054523681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3777886 + ... + 4095183.

It is an arithmetic number, because the mean of its divisors is an integer number (208179716940).

Almost surely, 2^{1249054523781} is an apocalyptic number.

It is an amenable number.

1249054523781 is a deficient number, since it is larger than the sum of its proper divisors (416383211739).

1249054523781 is an equidigital number, since it uses as much as digits as its factorization.

1249054523781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7925955.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 1249054523781 in words is "one trillion, two hundred forty-nine billion, fifty-four million, five hundred twenty-three thousand, seven hundred eighty-one".