1265791 has 4 divisors (see below), whose sum is σ = 1295272. Its totient is φ = 1236312.

The previous prime is 1265779. The next prime is 1265801. The reversal of 1265791 is 1975621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1265791 - 2⁹ = 1265279 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 (1265741) 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, 14676 + ... + 14761.

It is an arithmetic number, because the mean of its divisors is an integer number (323818).

2^1265791 is an apocalyptic number.

1265791 is a deficient number, since it is larger than the sum of its proper divisors (29481).

1265791 is an equidigital number, since it uses as much as digits as its factorization.

1265791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29480.

The product of its digits is 3780, while the sum is 31.

The square root of 1265791 is about 1125.0737753588. The cubic root of 1265791 is about 108.1734467205.

The spelling of 1265791 in words is "one million, two hundred sixty-five thousand, seven hundred ninety-one".