1265867 has 2 divisors, whose sum is σ = 1265868. Its totient is φ = 1265866.

The previous prime is 1265863. The next prime is 1265899. The reversal of 1265867 is 7685621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1265867 - 2² = 1265863 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1265861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632933 + 632934.

It is an arithmetic number, because the mean of its divisors is an integer number (632934).

2^1265867 is an apocalyptic number.

1265867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265867 is an equidigital number, since it uses as much as digits as its factorization.

1265867 is an evil number, because the sum of its binary digits is even.

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

The square root of 1265867 is about 1125.1075504146. The cubic root of 1265867 is about 108.1756116427.

The spelling of 1265867 in words is "one million, two hundred sixty-five thousand, eight hundred sixty-seven".