1249871055804 has 72 divisors (see below), whose sum is σ = 3823135007328. Its totient is φ = 336099778560.

The previous prime is 1249871055781. The next prime is 1249871055809. The reversal of 1249871055804 is 4085501789421.

1249871055804 is a `hidden beast` number, since 1 + 2 + 4 + 9 + 87 + 1 + 0 + 558 + 0 + 4 = 666.

It is a super-2 number, since 2×1249871055804² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249871055809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145872357 + ... + 145880924.

It is an arithmetic number, because the mean of its divisors is an integer number (53099097324).

Almost surely, 2^{1249871055804} is an apocalyptic number.

1249871055804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1249871055804 is an abundant number, since it is smaller than the sum of its proper divisors (2573263951524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1249871055804 is a wasteful number, since it uses less digits than its factorization.

1249871055804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291753315 (or 291753310 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 1249871055804 in words is "one trillion, two hundred forty-nine billion, eight hundred seventy-one million, fifty-five thousand, eight hundred four".