1285519 has 2 divisors, whose sum is σ = 1285520. Its totient is φ = 1285518.

The previous prime is 1285517. The next prime is 1285547. The reversal of 1285519 is 9155821.

It is a weak prime.

It is an emirp because it is prime and its reverse (9155821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1285519 - 2¹ = 1285517 is a prime.

It is a super-2 number, since 2×1285519² = 3305118198722, which contains 22 as substring.

Together with 1285517, it forms a pair of twin primes.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642759 + 642760.

It is an arithmetic number, because the mean of its divisors is an integer number (642760).

2^1285519 is an apocalyptic number.

1285519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285519 is an equidigital number, since it uses as much as digits as its factorization.

1285519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 31.

The square root of 1285519 is about 1133.8073028518. The cubic root of 1285519 is about 108.7325316550.

The spelling of 1285519 in words is "one million, two hundred eighty-five thousand, five hundred nineteen".