1267865 has 4 divisors (see below), whose sum is σ = 1521444. Its totient is φ = 1014288.

The previous prime is 1267859. The next prime is 1267873. The reversal of 1267865 is 5687621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5687621 = 691 ⋅8231.

It can be written as a sum of positive squares in 2 ways, for example, as 529984 + 737881 = 728^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 1267865 - 2¹⁰ = 1266841 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126782 + ... + 126791.

It is an arithmetic number, because the mean of its divisors is an integer number (380361).

2^1267865 is an apocalyptic number.

It is an amenable number.

1267865 is a deficient number, since it is larger than the sum of its proper divisors (253579).

1267865 is an equidigital number, since it uses as much as digits as its factorization.

1267865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253578.

The product of its digits is 20160, while the sum is 35.

The square root of 1267865 is about 1125.9951154423. The cubic root of 1267865 is about 108.2324952539.

The spelling of 1267865 in words is "one million, two hundred sixty-seven thousand, eight hundred sixty-five".