1280415 has 8 divisors (see below), whose sum is σ = 2048688. Its totient is φ = 682880.

The previous prime is 1280407. The next prime is 1280417. The reversal of 1280415 is 5140821.

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

It is not a de Polignac number, because 1280415 - 2³ = 1280407 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1280391 and 1280400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42666 + ... + 42695.

It is an arithmetic number, because the mean of its divisors is an integer number (256086).

2^1280415 is an apocalyptic number.

1280415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1280415 is a deficient number, since it is larger than the sum of its proper divisors (768273).

1280415 is an equidigital number, since it uses as much as digits as its factorization.

1280415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85369.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1280415 is about 1131.5542408564. The cubic root of 1280415 is about 108.5884375970.

The spelling of 1280415 in words is "one million, two hundred eighty thousand, four hundred fifteen".