1285717392247 has 2 divisors, whose sum is σ = 1285717392248. Its totient is φ = 1285717392246.

The previous prime is 1285717392217. The next prime is 1285717392277. The reversal of 1285717392247 is 7422937175821.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1285717392217) and next prime (1285717392277).

It is a cyclic number.

It is not a de Polignac number, because 1285717392247 - 2³⁵ = 1251357653879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285717392191 and 1285717392200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285717392217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642858696123 + 642858696124.

It is an arithmetic number, because the mean of its divisors is an integer number (642858696124).

Almost surely, 2^{1285717392247} is an apocalyptic number.

1285717392247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285717392247 is an equidigital number, since it uses as much as digits as its factorization.

1285717392247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 58.

The spelling of 1285717392247 in words is "one trillion, two hundred eighty-five billion, seven hundred seventeen million, three hundred ninety-two thousand, two hundred forty-seven".