1308897 has 6 divisors (see below), whose sum is σ = 1890642. Its totient is φ = 872592.

The previous prime is 1308887. The next prime is 1308899. The reversal of 1308897 is 7988031.

It can be written as a sum of positive squares in only one way, i.e., 904401 + 404496 = 951^2 + 636^2 .

It is not a de Polignac number, because 1308897 - 2¹¹ = 1306849 is a prime.

It is a super-2 number, since 2×1308897² = 3426422713218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1308899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72708 + ... + 72725.

It is an arithmetic number, because the mean of its divisors is an integer number (315107).

2^1308897 is an apocalyptic number.

It is an amenable number.

1308897 is a deficient number, since it is larger than the sum of its proper divisors (581745).

1308897 is a wasteful number, since it uses less digits than its factorization.

1308897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145439 (or 145436 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1308897 is about 1144.0703649689. The cubic root of 1308897 is about 109.3876999675.

The spelling of 1308897 in words is "one million, three hundred eight thousand, eight hundred ninety-seven".