1280715 has 8 divisors (see below), whose sum is σ = 2049168. Its totient is φ = 683040.

The previous prime is 1280707. The next prime is 1280737. The reversal of 1280715 is 5170821.

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

It is not a de Polignac number, because 1280715 - 2³ = 1280707 is a prime.

It is a super-2 number, since 2×1280715² = 3280461822450, which contains 22 as substring.

It is an Ulam number.

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, 42676 + ... + 42705.

It is an arithmetic number, because the mean of its divisors is an integer number (256146).

2^1280715 is an apocalyptic number.

1280715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1280715 is a deficient number, since it is larger than the sum of its proper divisors (768453).

1280715 is an equidigital number, since it uses as much as digits as its factorization.

1280715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85389.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 1280715 is about 1131.6867941264. The cubic root of 1280715 is about 108.5969176569.

The spelling of 1280715 in words is "one million, two hundred eighty thousand, seven hundred fifteen".