1273705 has 4 divisors (see below), whose sum is σ = 1528452. Its totient is φ = 1018960.

The previous prime is 1273693. The next prime is 1273721. The reversal of 1273705 is 5073721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 737881 + 535824 = 859^2 + 732^2 .

It is not a de Polignac number, because 1273705 - 2⁵ = 1273673 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 1273705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127366 + ... + 127375.

It is an arithmetic number, because the mean of its divisors is an integer number (382113).

2^1273705 is an apocalyptic number.

It is an amenable number.

1273705 is a deficient number, since it is larger than the sum of its proper divisors (254747).

1273705 is an equidigital number, since it uses as much as digits as its factorization.

1273705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254746.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 1273705 is about 1128.5853977436. The cubic root of 1273705 is about 108.3984197970.

The spelling of 1273705 in words is "one million, two hundred seventy-three thousand, seven hundred five".