1265897 has 6 divisors (see below), whose sum is σ = 1323882. Its totient is φ = 1210352.

The previous prime is 1265867. The next prime is 1265899. The reversal of 1265897 is 7985621.

It can be written as a sum of positive squares in only one way, i.e., 724201 + 541696 = 851^2 + 736^2 .

It is not a de Polignac number, because 1265897 - 2¹⁰ = 1264873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265897.

It is not an unprimeable number, because it can be changed into a prime (1265899) 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, 668 + ... + 1725.

It is an arithmetic number, because the mean of its divisors is an integer number (220647).

2^1265897 is an apocalyptic number.

It is an amenable number.

1265897 is a deficient number, since it is larger than the sum of its proper divisors (57985).

1265897 is an equidigital number, since it uses as much as digits as its factorization.

1265897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439 (or 2416 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 1265897 is about 1125.1208823944. The cubic root of 1265897 is about 108.1764661935.

The spelling of 1265897 in words is "one million, two hundred sixty-five thousand, eight hundred ninety-seven".