1280587 has 8 divisors (see below), whose sum is σ = 1596672. Its totient is φ = 997800.

The previous prime is 1280567. The next prime is 1280597. The reversal of 1280587 is 7850821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1280537) 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, 8239 + ... + 8392.

It is an arithmetic number, because the mean of its divisors is an integer number (199584).

2^1280587 is an apocalyptic number.

1280587 is a deficient number, since it is larger than the sum of its proper divisors (316085).

1280587 is a wasteful number, since it uses less digits than its factorization.

1280587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16649.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1280587 is about 1131.6302399636. The cubic root of 1280587 is about 108.5932996600.

The spelling of 1280587 in words is "one million, two hundred eighty thousand, five hundred eighty-seven".