1275729 has 16 divisors (see below), whose sum is σ = 2093952. Its totient is φ = 672768.

The previous prime is 1275719. The next prime is 1275737. The reversal of 1275729 is 9275721.

It is not a de Polignac number, because 1275729 - 2⁷ = 1275601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1275729.

It is not an unprimeable number, because it can be changed into a prime (1275709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2064 + ... + 2609.

It is an arithmetic number, because the mean of its divisors is an integer number (130872).

2^1275729 is an apocalyptic number.

It is an amenable number.

1275729 is a deficient number, since it is larger than the sum of its proper divisors (818223).

1275729 is a wasteful number, since it uses less digits than its factorization.

1275729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696.

The product of its digits is 8820, while the sum is 33.

The square root of 1275729 is about 1129.4817395602. The cubic root of 1275729 is about 108.4558067878.

The spelling of 1275729 in words is "one million, two hundred seventy-five thousand, seven hundred twenty-nine".