1281073 has 4 divisors (see below), whose sum is σ = 1286208. Its totient is φ = 1275940.

The previous prime is 1281047. The next prime is 1281083. The reversal of 1281073 is 3701821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3701821 = 29 ⋅127649.

It is a cyclic number.

It is not a de Polignac number, because 1281073 - 2⁵ = 1281041 is a prime.

It is a super-2 number, since 2×1281073² = 3282296062658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281043) 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, 2173 + ... + 2698.

It is an arithmetic number, because the mean of its divisors is an integer number (321552).

2^1281073 is an apocalyptic number.

It is an amenable number.

1281073 is a deficient number, since it is larger than the sum of its proper divisors (5135).

1281073 is an equidigital number, since it uses as much as digits as its factorization.

1281073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5134.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1281073 is about 1131.8449540463. The cubic root of 1281073 is about 108.6070354620.

Adding to 1281073 its reverse (3701821), we get a palindrome (4982894).

The spelling of 1281073 in words is "one million, two hundred eighty-one thousand, seventy-three".