1243854812133 has 48 divisors (see below), whose sum is σ = 1821497812992. Its totient is φ = 817868016000.

The previous prime is 1243854812129. The next prime is 1243854812143. The reversal of 1243854812133 is 3312184583421.

1243854812133 is a `hidden beast` number, since 1 + 2 + 4 + 38 + 5 + 481 + 2 + 133 = 666.

It is not a de Polignac number, because 1243854812133 - 2² = 1243854812129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243854812143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 255882123 + ... + 255886983.

It is an arithmetic number, because the mean of its divisors is an integer number (37947871104).

Almost surely, 2^{1243854812133} is an apocalyptic number.

It is an amenable number.

1243854812133 is a deficient number, since it is larger than the sum of its proper divisors (577643000859).

1243854812133 is a wasteful number, since it uses less digits than its factorization.

1243854812133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6266 (or 6263 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 1243854812133 in words is "one trillion, two hundred forty-three billion, eight hundred fifty-four million, eight hundred twelve thousand, one hundred thirty-three".