1280423 has 8 divisors (see below), whose sum is σ = 1370160. Its totient is φ = 1192320.

The previous prime is 1280417. The next prime is 1280431. The reversal of 1280423 is 3240821.

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

It is a cyclic number.

It is not a de Polignac number, because 1280423 - 2⁴ = 1280407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1280395 and 1280404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1508 + ... + 2198.

It is an arithmetic number, because the mean of its divisors is an integer number (171270).

2^1280423 is an apocalyptic number.

1280423 is a deficient number, since it is larger than the sum of its proper divisors (89737).

1280423 is a wasteful number, since it uses less digits than its factorization.

1280423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1280423 is about 1131.5577758117. The cubic root of 1280423 is about 108.5886637491.

It can be divided in two parts, 128042 and 3, that multiplied together give a triangular number (384126 = T₈₇₆).

The spelling of 1280423 in words is "one million, two hundred eighty thousand, four hundred twenty-three".