1385287 has 2 divisors, whose sum is σ = 1385288. Its totient is φ = 1385286.

The previous prime is 1385273. The next prime is 1385291. The reversal of 1385287 is 7825831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1385287 is a prime.

1385287 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692643 + 692644.

It is an arithmetic number, because the mean of its divisors is an integer number (692644).

2^1385287 is an apocalyptic number.

1385287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385287 is an equidigital number, since it uses as much as digits as its factorization.

1385287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 1385287 is about 1176.9821578937. The cubic root of 1385287 is about 111.4756259269.

The spelling of 1385287 in words is "one million, three hundred eighty-five thousand, two hundred eighty-seven".