1272281 has 2 divisors, whose sum is σ = 1272282. Its totient is φ = 1272280.

The previous prime is 1272269. The next prime is 1272283. The reversal of 1272281 is 1822721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 931225 + 341056 = 965^2 + 584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272281 is a prime.

It is a super-2 number, since 2×1272281² = 3237397885922, which contains 22 as substring.

Together with 1272283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1272283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636140 + 636141.

It is an arithmetic number, because the mean of its divisors is an integer number (636141).

2^1272281 is an apocalyptic number.

It is an amenable number.

1272281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272281 is an equidigital number, since it uses as much as digits as its factorization.

1272281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 23.

The square root of 1272281 is about 1127.9543430476. The cubic root of 1272281 is about 108.3580083176.

The spelling of 1272281 in words is "one million, two hundred seventy-two thousand, two hundred eighty-one".