1251344004543 has 24 divisors (see below), whose sum is σ = 1813000316400. Its totient is φ = 831690155520.

The previous prime is 1251344004517. The next prime is 1251344004571. The reversal of 1251344004543 is 3454004431521.

1251344004543 is a `hidden beast` number, since 125 + 13 + 440 + 0 + 45 + 43 = 666.

It is not a de Polignac number, because 1251344004543 - 2¹³ = 1251343996351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1251344004498 and 1251344004507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251344004503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19168348 + ... + 19233518.

It is an arithmetic number, because the mean of its divisors is an integer number (75541679850).

Almost surely, 2^{1251344004543} is an apocalyptic number.

1251344004543 is a deficient number, since it is larger than the sum of its proper divisors (561656311857).

1251344004543 is a wasteful number, since it uses less digits than its factorization.

1251344004543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71639 (or 71636 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 1251344004543 in words is "one trillion, two hundred fifty-one billion, three hundred forty-four million, four thousand, five hundred forty-three".