1272885 has 8 divisors (see below), whose sum is σ = 2036640. Its totient is φ = 678864.

The previous prime is 1272883. The next prime is 1272893. The reversal of 1272885 is 5882721.

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

It is not a de Polignac number, because 1272885 - 2¹ = 1272883 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42415 + ... + 42444.

It is an arithmetic number, because the mean of its divisors is an integer number (254580).

2^1272885 is an apocalyptic number.

1272885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1272885 is a deficient number, since it is larger than the sum of its proper divisors (763755).

1272885 is an equidigital number, since it uses as much as digits as its factorization.

1272885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84867.

The product of its digits is 8960, while the sum is 33.

The square root of 1272885 is about 1128.2220526120. Note that the first 3 decimals coincide. The cubic root of 1272885 is about 108.3751528223.

The spelling of 1272885 in words is "one million, two hundred seventy-two thousand, eight hundred eighty-five".