1272865 has 8 divisors (see below), whose sum is σ = 1666368. Its totient is φ = 925680.

The previous prime is 1272863. The next prime is 1272881. The reversal of 1272865 is 5682721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1272865 - 2¹ = 1272863 is a prime.

1272865 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1272863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11517 + ... + 11626.

It is an arithmetic number, because the mean of its divisors is an integer number (208296).

2^1272865 is an apocalyptic number.

It is an amenable number.

1272865 is a deficient number, since it is larger than the sum of its proper divisors (393503).

1272865 is a wasteful number, since it uses less digits than its factorization.

1272865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23159.

The product of its digits is 6720, while the sum is 31.

The square root of 1272865 is about 1128.2131890738. The cubic root of 1272865 is about 108.3745852103.

It can be divided in two parts, 127 and 2865, that added together give a palindrome (2992).

The spelling of 1272865 in words is "one million, two hundred seventy-two thousand, eight hundred sixty-five".