1307897 has 4 divisors (see below), whose sum is σ = 1312116. Its totient is φ = 1303680.

The previous prime is 1307893. The next prime is 1307909. The reversal of 1307897 is 7987031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7987031 = 13 ⋅614387.

It can be written as a sum of positive squares in 2 ways, for example, as 583696 + 724201 = 764^2 + 851^2 .

It is a cyclic number.

It is not a de Polignac number, because 1307897 - 2² = 1307893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1307893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1604 + ... + 2277.

It is an arithmetic number, because the mean of its divisors is an integer number (328029).

2^1307897 is an apocalyptic number.

It is an amenable number.

1307897 is a deficient number, since it is larger than the sum of its proper divisors (4219).

1307897 is an equidigital number, since it uses as much as digits as its factorization.

1307897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 1307897 is about 1143.6332454069. The cubic root of 1307897 is about 109.3598353942.

The spelling of 1307897 in words is "one million, three hundred seven thousand, eight hundred ninety-seven".