1280331 has 24 divisors (see below), whose sum is σ = 2061696. Its totient is φ = 760320.

The previous prime is 1280317. The next prime is 1280333. The reversal of 1280331 is 1330821.

It is not a de Polignac number, because 1280331 - 2⁶ = 1280267 is a prime.

It is a super-2 number, since 2×1280331² = 3278494939122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1280333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3451 + ... + 3803.

It is an arithmetic number, because the mean of its divisors is an integer number (85904).

2^1280331 is an apocalyptic number.

1280331 is a deficient number, since it is larger than the sum of its proper divisors (781365).

1280331 is a wasteful number, since it uses less digits than its factorization.

1280331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 400 counting only the distinct ones).

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

The square root of 1280331 is about 1131.5171231581. The cubic root of 1280331 is about 108.5860629429.

The spelling of 1280331 in words is "one million, two hundred eighty thousand, three hundred thirty-one".