1270561 has 2 divisors, whose sum is σ = 1270562. Its totient is φ = 1270560.

The previous prime is 1270559. The next prime is 1270567. The reversal of 1270561 is 1650721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089936 + 180625 = 1044^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270561 - 2¹ = 1270559 is a prime.

It is a super-2 number, since 2×1270561² = 3228650509442, which contains 22 as substring.

Together with 1270559, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1270567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635280 + 635281.

It is an arithmetic number, because the mean of its divisors is an integer number (635281).

2^1270561 is an apocalyptic number.

It is an amenable number.

1270561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270561 is an equidigital number, since it uses as much as digits as its factorization.

1270561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1270561 is about 1127.1916429782. The cubic root of 1270561 is about 108.3091564720.

The spelling of 1270561 in words is "one million, two hundred seventy thousand, five hundred sixty-one".