1271281 has 4 divisors (see below), whose sum is σ = 1386864. Its totient is φ = 1155700.

The previous prime is 1271251. The next prime is 1271293. The reversal of 1271281 is 1821721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1821721 = 11 ⋅165611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1271281 is a prime.

It is a super-2 number, since 2×1271281² = 3232310761922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1271281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1271201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57775 + ... + 57796.

It is an arithmetic number, because the mean of its divisors is an integer number (346716).

2^1271281 is an apocalyptic number.

1271281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1271281 is a deficient number, since it is larger than the sum of its proper divisors (115583).

1271281 is a wasteful number, since it uses less digits than its factorization.

1271281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115582.

The product of its digits is 224, while the sum is 22.

The square root of 1271281 is about 1127.5109755563. The cubic root of 1271281 is about 108.3296114435.

The spelling of 1271281 in words is "one million, two hundred seventy-one thousand, two hundred eighty-one".