1280506 has 8 divisors (see below), whose sum is σ = 1934100. Its totient is φ = 635808.

The previous prime is 1280473. The next prime is 1280519. The reversal of 1280506 is 6050821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1229881 + 50625 = 1109^2 + 225^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851 + ... + 2446.

2^1280506 is an apocalyptic number.

1280506 is a deficient number, since it is larger than the sum of its proper divisors (653594).

1280506 is a wasteful number, since it uses less digits than its factorization.

1280506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4448.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1280506 is about 1131.5944503222. The cubic root of 1280506 is about 108.5910100218.

The spelling of 1280506 in words is "one million, two hundred eighty thousand, five hundred six".