1308224 has 14 divisors (see below), whose sum is σ = 2596134. Its totient is φ = 654080.

The previous prime is 1308221. The next prime is 1308247. The reversal of 1308224 is 4228031.

It can be written as a sum of positive squares in only one way, i.e., 1254400 + 53824 = 1120^2 + 232^2 .

It is a super-2 number, since 2×1308224² = 3422900068352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1308196 and 1308205.

It is not an unprimeable number, because it can be changed into a prime (1308221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157 + ... + 10284.

2^1308224 is an apocalyptic number.

It is an amenable number.

1308224 is a deficient number, since it is larger than the sum of its proper divisors (1287910).

1308224 is an equidigital number, since it uses as much as digits as its factorization.

1308224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20453 (or 20443 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1308224 is about 1143.7762018857. The cubic root of 1308224 is about 109.3689486720.

The spelling of 1308224 in words is "one million, three hundred eight thousand, two hundred twenty-four".