1285057399 has 2 divisors, whose sum is σ = 1285057400. Its totient is φ = 1285057398.

The previous prime is 1285057393. The next prime is 1285057427. The reversal of 1285057399 is 9937505821.

It is a weak prime.

It is an emirp because it is prime and its reverse (9937505821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1285057399 - 2³ = 1285057391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285057391) 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, 642528699 + 642528700.

It is an arithmetic number, because the mean of its divisors is an integer number (642528700).

Almost surely, 2^1285057399 is an apocalyptic number.

1285057399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285057399 is an equidigital number, since it uses as much as digits as its factorization.

1285057399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 1285057399 is about 35847.6972621673. The cubic root of 1285057399 is about 1087.1951562694.

The spelling of 1285057399 in words is "one billion, two hundred eighty-five million, fifty-seven thousand, three hundred ninety-nine".