1285199 has 2 divisors, whose sum is σ = 1285200. Its totient is φ = 1285198.

The previous prime is 1285181. The next prime is 1285213. The reversal of 1285199 is 9915821.

It is a strong prime.

It is an emirp because it is prime and its reverse (9915821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1285199 - 2¹⁶ = 1219663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642599 + 642600.

It is an arithmetic number, because the mean of its divisors is an integer number (642600).

2^1285199 is an apocalyptic number.

1285199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285199 is an equidigital number, since it uses as much as digits as its factorization.

1285199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 35.

The square root of 1285199 is about 1133.6661766146. Note that the first 3 decimals coincide. The cubic root of 1285199 is about 108.7235087629.

The spelling of 1285199 in words is "one million, two hundred eighty-five thousand, one hundred ninety-nine".