1285140047 has 2 divisors, whose sum is σ = 1285140048. Its totient is φ = 1285140046.

The previous prime is 1285139953. The next prime is 1285140071. The reversal of 1285140047 is 7400415821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1285140047 - 2¹⁸ = 1284877903 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285139995 and 1285140022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285140547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642570023 + 642570024.

It is an arithmetic number, because the mean of its divisors is an integer number (642570024).

Almost surely, 2^1285140047 is an apocalyptic number.

1285140047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285140047 is an equidigital number, since it uses as much as digits as its factorization.

1285140047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 1285140047 is about 35848.8500094494. The cubic root of 1285140047 is about 1087.2184632903.

Adding to 1285140047 its reverse (7400415821), we get a palindrome (8685555868).

The spelling of 1285140047 in words is "one billion, two hundred eighty-five million, one hundred forty thousand, forty-seven".