1280519 has 2 divisors, whose sum is σ = 1280520. Its totient is φ = 1280518.

The previous prime is 1280473. The next prime is 1280537. The reversal of 1280519 is 9150821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1280519 - 2²⁰ = 231943 is a prime.

It is a super-2 number, since 2×1280519² = 3279457818722, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640259 + 640260.

It is an arithmetic number, because the mean of its divisors is an integer number (640260).

2^1280519 is an apocalyptic number.

1280519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280519 is an equidigital number, since it uses as much as digits as its factorization.

1280519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1280519 is about 1131.6001944150. The cubic root of 1280519 is about 108.5913775011.

The spelling of 1280519 in words is "one million, two hundred eighty thousand, five hundred nineteen".