1272871 has 4 divisors (see below), whose sum is σ = 1275552. Its totient is φ = 1270192.

The previous prime is 1272863. The next prime is 1272881. The reversal of 1272871 is 1782721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1782721 = 41 ⋅43481.

It is a cyclic number.

It is not a de Polignac number, because 1272871 - 2³ = 1272863 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272811) 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 3 ways as a sum of consecutive naturals, for example, 415 + ... + 1648.

It is an arithmetic number, because the mean of its divisors is an integer number (318888).

2^1272871 is an apocalyptic number.

1272871 is a deficient number, since it is larger than the sum of its proper divisors (2681).

1272871 is an equidigital number, since it uses as much as digits as its factorization.

1272871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680.

The product of its digits is 1568, while the sum is 28.

The square root of 1272871 is about 1128.2158481425. The cubic root of 1272871 is about 108.3747554945.

The spelling of 1272871 in words is "one million, two hundred seventy-two thousand, eight hundred seventy-one".