1281063 has 16 divisors (see below), whose sum is σ = 1990656. Its totient is φ = 717600.

The previous prime is 1281047. The next prime is 1281083. The reversal of 1281063 is 3601821.

It is not a de Polignac number, because 1281063 - 2⁴ = 1281047 is a prime.

It is a super-2 number, since 2×1281063² = 3282244819938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538 + ... + 1688.

It is an arithmetic number, because the mean of its divisors is an integer number (124416).

2^1281063 is an apocalyptic number.

1281063 is a deficient number, since it is larger than the sum of its proper divisors (709593).

1281063 is a wasteful number, since it uses less digits than its factorization.

1281063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1281063 is about 1131.8405364715. The cubic root of 1281063 is about 108.6067528674.

Adding to 1281063 its reverse (3601821), we get a palindrome (4882884).

The spelling of 1281063 in words is "one million, two hundred eighty-one thousand, sixty-three".