1308857 has 12 divisors (see below), whose sum is σ = 1492260. Its totient is φ = 1145760.

The previous prime is 1308841. The next prime is 1308863. The reversal of 1308857 is 7588031.

It can be written as a sum of positive squares in 2 ways, for example, as 698896 + 609961 = 836^2 + 781^2 .

It is not a de Polignac number, because 1308857 - 2⁴ = 1308841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1308887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3323 + ... + 3695.

It is an arithmetic number, because the mean of its divisors is an integer number (124355).

2^1308857 is an apocalyptic number.

It is an amenable number.

1308857 is a deficient number, since it is larger than the sum of its proper divisors (183403).

1308857 is a wasteful number, since it uses less digits than its factorization.

1308857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1308857 is about 1144.0528833931. The cubic root of 1308857 is about 109.3865856571.

The spelling of 1308857 in words is "one million, three hundred eight thousand, eight hundred fifty-seven".