1285421322823 has 16 divisors (see below), whose sum is σ = 1463650440192. Its totient is φ = 1117449036000.

The previous prime is 1285421322799. The next prime is 1285421322851. The reversal of 1285421322823 is 3282231245821.

It is a de Polignac number, because none of the positive numbers 2^k-1285421322823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285421322823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285421328823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219013 + ... + 1618273.

It is an arithmetic number, because the mean of its divisors is an integer number (91478152512).

Almost surely, 2^{1285421322823} is an apocalyptic number.

1285421322823 is a deficient number, since it is larger than the sum of its proper divisors (178229117369).

1285421322823 is a wasteful number, since it uses less digits than its factorization.

1285421322823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402926.

The product of its digits is 368640, while the sum is 43.

The spelling of 1285421322823 in words is "one trillion, two hundred eighty-five billion, four hundred twenty-one million, three hundred twenty-two thousand, eight hundred twenty-three".