1280215 has 8 divisors (see below), whose sum is σ = 1565568. Its totient is φ = 1004640.

The previous prime is 1280183. The next prime is 1280221. The reversal of 1280215 is 5120821.

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

It is not a de Polignac number, because 1280215 - 2⁵ = 1280183 is a prime.

It is a Duffinian number.

1280215 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1280192 and 1280201.

It is a congruent number.

It is an unprimeable number.

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, 2151 + ... + 2680.

It is an arithmetic number, because the mean of its divisors is an integer number (195696).

2^1280215 is an apocalyptic number.

1280215 is a deficient number, since it is larger than the sum of its proper divisors (285353).

1280215 is an equidigital number, since it uses as much as digits as its factorization.

1280215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4889.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1280215 is about 1131.4658633825. The cubic root of 1280215 is about 108.5827834879.

Subtracting 1280215 from its reverse (5120821), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 1280215 in words is "one million, two hundred eighty thousand, two hundred fifteen".