1280011 has 4 divisors (see below), whose sum is σ = 1347400. Its totient is φ = 1212624.

The previous prime is 1279997. The next prime is 1280023. The reversal of 1280011 is 1100821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1100821 = 313 ⋅3517.

It is a cyclic number.

It is not a de Polignac number, because 1280011 - 2¹⁵ = 1247243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1279973 and 1280000.

It is not an unprimeable number, because it can be changed into a prime (1283011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33666 + ... + 33703.

It is an arithmetic number, because the mean of its divisors is an integer number (336850).

2^1280011 is an apocalyptic number.

1280011 is a deficient number, since it is larger than the sum of its proper divisors (67389).

1280011 is an equidigital number, since it uses as much as digits as its factorization.

1280011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67388.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1280011 is about 1131.3757112472. The cubic root of 1280011 is about 108.5770156899.

Adding to 1280011 its reverse (1100821), we get a palindrome (2380832).

The spelling of 1280011 in words is "one million, two hundred eighty thousand, eleven".