1280617 has 8 divisors (see below), whose sum is σ = 1439424. Its totient is φ = 1130448.

The previous prime is 1280603. The next prime is 1280623. The reversal of 1280617 is 7160821.

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-1280617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1280591 and 1280600.

It is not an unprimeable number, because it can be changed into a prime (1280677) 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, 1843 + ... + 2440.

It is an arithmetic number, because the mean of its divisors is an integer number (179928).

2^1280617 is an apocalyptic number.

It is an amenable number.

1280617 is a deficient number, since it is larger than the sum of its proper divisors (158807).

1280617 is a wasteful number, since it uses less digits than its factorization.

1280617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1280617 is about 1131.6434950991. The cubic root of 1280617 is about 108.5941476496.

The spelling of 1280617 in words is "one million, two hundred eighty thousand, six hundred seventeen".