1273791 has 4 divisors (see below), whose sum is σ = 1698392. Its totient is φ = 849192.

The previous prime is 1273787. The next prime is 1273823. The reversal of 1273791 is 1973721.

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

It is not a de Polignac number, because 1273791 - 2² = 1273787 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273721) 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, 212296 + ... + 212301.

It is an arithmetic number, because the mean of its divisors is an integer number (424598).

2^1273791 is an apocalyptic number.

1273791 is a deficient number, since it is larger than the sum of its proper divisors (424601).

1273791 is an equidigital number, since it uses as much as digits as its factorization.

1273791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424600.

The product of its digits is 2646, while the sum is 30.

The square root of 1273791 is about 1128.6234978947. The cubic root of 1273791 is about 108.4008594132.

The spelling of 1273791 in words is "one million, two hundred seventy-three thousand, seven hundred ninety-one".