1280515 has 8 divisors (see below), whose sum is σ = 1569600. Its totient is φ = 1002432.

The previous prime is 1280473. The next prime is 1280519. The reversal of 1280515 is 5150821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1280515 - 2¹¹ = 1278467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1280519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2490 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (196200).

2^1280515 is an apocalyptic number.

1280515 is a deficient number, since it is larger than the sum of its proper divisors (289085).

1280515 is an equidigital number, since it uses as much as digits as its factorization.

1280515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1280515 is about 1131.5984270049. The cubic root of 1280515 is about 108.5912644308.

The spelling of 1280515 in words is "one million, two hundred eighty thousand, five hundred fifteen".