1281013 has 8 divisors (see below), whose sum is σ = 1354496. Its totient is φ = 1210860.

The previous prime is 1280989. The next prime is 1281029. The reversal of 1281013 is 3101821.

It is a de Polignac number, because none of the positive numbers 2^k-1281013 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29770 + ... + 29812.

It is an arithmetic number, because the mean of its divisors is an integer number (169312).

2^1281013 is an apocalyptic number.

It is an amenable number.

1281013 is a deficient number, since it is larger than the sum of its proper divisors (73483).

1281013 is an frugal number, since it uses more digits than its factorization.

1281013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1281013 is about 1131.8184483388. The cubic root of 1281013 is about 108.6053398720.

Adding to 1281013 its reverse (3101821), we get a palindrome (4382834).

The spelling of 1281013 in words is "one million, two hundred eighty-one thousand, thirteen".