1285492399 has 2 divisors, whose sum is σ = 1285492400. Its totient is φ = 1285492398.

The previous prime is 1285492381. The next prime is 1285492421. The reversal of 1285492399 is 9932945821.

It is a weak prime.

It is an emirp because it is prime and its reverse (9932945821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1285492399 - 2⁹ = 1285491887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285492099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642746199 + 642746200.

It is an arithmetic number, because the mean of its divisors is an integer number (642746200).

Almost surely, 2^1285492399 is an apocalyptic number.

1285492399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285492399 is an equidigital number, since it uses as much as digits as its factorization.

1285492399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The square root of 1285492399 is about 35853.7640841237. The cubic root of 1285492399 is about 1087.3178165594.

The spelling of 1285492399 in words is "one billion, two hundred eighty-five million, four hundred ninety-two thousand, three hundred ninety-nine".