1280073 has 4 divisors (see below), whose sum is σ = 1706768. Its totient is φ = 853380.

The previous prime is 1280023. The next prime is 1280101. The reversal of 1280073 is 3700821.

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: 3700821 = 3 ⋅1233607.

It is not a de Polignac number, because 1280073 - 2⁹ = 1279561 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1280023) 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, 213343 + ... + 213348.

It is an arithmetic number, because the mean of its divisors is an integer number (426692).

2^1280073 is an apocalyptic number.

It is an amenable number.

1280073 is a deficient number, since it is larger than the sum of its proper divisors (426695).

1280073 is an equidigital number, since it uses as much as digits as its factorization.

1280073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426694.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1280073 is about 1131.4031111854. The cubic root of 1280073 is about 108.5787687130.

Adding to 1280073 its reverse (3700821), we get a palindrome (4980894).

The spelling of 1280073 in words is "one million, two hundred eighty thousand, seventy-three".