1285717392803 has 4 divisors (see below), whose sum is σ = 1307509213080. Its totient is φ = 1263925572528.

The previous prime is 1285717392787. The next prime is 1285717392829. The reversal of 1285717392803 is 3082937175821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1285717392803 - 2⁴ = 1285717392787 is a prime.

It is a super-2 number, since 2×1285717392803² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285717392503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10895910050 + ... + 10895910167.

It is an arithmetic number, because the mean of its divisors is an integer number (326877303270).

Almost surely, 2^{1285717392803} is an apocalyptic number.

1285717392803 is a deficient number, since it is larger than the sum of its proper divisors (21791820277).

1285717392803 is an equidigital number, since it uses as much as digits as its factorization.

1285717392803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21791820276.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 1285717392803 in words is "one trillion, two hundred eighty-five billion, seven hundred seventeen million, three hundred ninety-two thousand, eight hundred three".