1280313 has 8 divisors (see below), whose sum is σ = 1896800. Its totient is φ = 853524.

The previous prime is 1280309. The next prime is 1280317. The reversal of 1280313 is 3130821.

It is an interprime number because it is at equal distance from previous prime (1280309) and next prime (1280317).

It is not a de Polignac number, because 1280313 - 2² = 1280309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280317) 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, 23683 + ... + 23736.

It is an arithmetic number, because the mean of its divisors is an integer number (237100).

2^1280313 is an apocalyptic number.

It is an amenable number.

1280313 is a deficient number, since it is larger than the sum of its proper divisors (616487).

1280313 is an equidigital number, since it uses as much as digits as its factorization.

1280313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47428 (or 47422 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1280313 is about 1131.5091692072. The cubic root of 1280313 is about 108.5855540750.

The spelling of 1280313 in words is "one million, two hundred eighty thousand, three hundred thirteen".