1272565 has 16 divisors (see below), whose sum is σ = 1767168. Its totient is φ = 861696.

The previous prime is 1272559. The next prime is 1272577. The reversal of 1272565 is 5652721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272565 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 3429 + ... + 3781.

It is an arithmetic number, because the mean of its divisors is an integer number (110448).

2^1272565 is an apocalyptic number.

It is an amenable number.

1272565 is a deficient number, since it is larger than the sum of its proper divisors (494603).

1272565 is a wasteful number, since it uses less digits than its factorization.

1272565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its digits is 4200, while the sum is 28.

The square root of 1272565 is about 1128.0802276434. The cubic root of 1272565 is about 108.3660703167.

The spelling of 1272565 in words is "one million, two hundred seventy-two thousand, five hundred sixty-five".