1281713 has 8 divisors (see below), whose sum is σ = 1338600. Its totient is φ = 1225728.

The previous prime is 1281703. The next prime is 1281727. The reversal of 1281713 is 3171821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 327184 + 954529 = 572^2 + 977^2 .

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 1281713 - 2⁴ = 1281697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281703) 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, 5483 + ... + 5711.

It is an arithmetic number, because the mean of its divisors is an integer number (167325).

2^1281713 is an apocalyptic number.

It is an amenable number.

1281713 is a deficient number, since it is larger than the sum of its proper divisors (56887).

1281713 is a wasteful number, since it uses less digits than its factorization.

1281713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451.

The product of its digits is 336, while the sum is 23.

The square root of 1281713 is about 1132.1276429802. The cubic root of 1281713 is about 108.6251184625.

The spelling of 1281713 in words is "one million, two hundred eighty-one thousand, seven hundred thirteen".