1271563 has 8 divisors (see below), whose sum is σ = 1328400. Its totient is φ = 1215648.

The previous prime is 1271561. The next prime is 1271597. The reversal of 1271563 is 3651721.

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

It is a cyclic number.

It is not a de Polignac number, because 1271563 - 2¹ = 1271561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271561) 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, 4593 + ... + 4861.

It is an arithmetic number, because the mean of its divisors is an integer number (166050).

2^1271563 is an apocalyptic number.

1271563 is a deficient number, since it is larger than the sum of its proper divisors (56837).

1271563 is a wasteful number, since it uses less digits than its factorization.

1271563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461.

The product of its digits is 1260, while the sum is 25.

The square root of 1271563 is about 1127.6360228372. The cubic root of 1271563 is about 108.3376208691.

The spelling of 1271563 in words is "one million, two hundred seventy-one thousand, five hundred sixty-three".