1308281 has 8 divisors (see below), whose sum is σ = 1420104. Its totient is φ = 1198080.

The previous prime is 1308247. The next prime is 1308287. The reversal of 1308281 is 1828031.

1308281 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 4 ways, for example, as 133225 + 1175056 = 365^2 + 1084^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1308281 is a prime.

It is a super-2 number, since 2×1308281² = 3423198349922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1308287) 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, 1721 + ... + 2361.

It is an arithmetic number, because the mean of its divisors is an integer number (177513).

2^1308281 is an apocalyptic number.

It is an amenable number.

1308281 is a deficient number, since it is larger than the sum of its proper divisors (111823).

1308281 is a wasteful number, since it uses less digits than its factorization.

1308281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1308281 is about 1143.8011190762. The cubic root of 1308281 is about 109.3705370696.

The spelling of 1308281 in words is "one million, three hundred eight thousand, two hundred eighty-one".