1308881 has 12 divisors (see below), whose sum is σ = 1591488. Its totient is φ = 1054272.

The previous prime is 1308869. The next prime is 1308883. The reversal of 1308881 is 1888031.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1308881 is a prime.

It is a super-2 number, since 2×1308881² = 3426338944322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308883) 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, 1700 + ... + 2346.

It is an arithmetic number, because the mean of its divisors is an integer number (132624).

2^1308881 is an apocalyptic number.

It is an amenable number.

1308881 is a deficient number, since it is larger than the sum of its proper divisors (282607).

1308881 is an equidigital number, since it uses as much as digits as its factorization.

1308881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 1308881 is about 1144.0633723706. The cubic root of 1308881 is about 109.3872542460.

The spelling of 1308881 in words is "one million, three hundred eight thousand, eight hundred eighty-one".