1308681 has 12 divisors (see below), whose sum is σ = 2062320. Its totient is φ = 793080.

The previous prime is 1308649. The next prime is 1308691. The reversal of 1308681 is 1868031.

It is not a de Polignac number, because 1308681 - 2⁵ = 1308649 is a prime.

It is a super-2 number, since 2×1308681² = 3425291919522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1308611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6511 + ... + 6708.

It is an arithmetic number, because the mean of its divisors is an integer number (171860).

2^1308681 is an apocalyptic number.

1308681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1308681 is a deficient number, since it is larger than the sum of its proper divisors (753639).

1308681 is a wasteful number, since it uses less digits than its factorization.

1308681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13236 (or 13233 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1308681 is about 1143.9759612859. The cubic root of 1308681 is about 109.3816824217.

The spelling of 1308681 in words is "one million, three hundred eight thousand, six hundred eighty-one".