1213713 has 6 divisors (see below), whose sum is σ = 1753154. Its totient is φ = 809136.

The previous prime is 1213673. The next prime is 1213721. The reversal of 1213713 is 3173121.

It can be written as a sum of positive squares in only one way, i.e., 762129 + 451584 = 873^2 + 672^2 .

It is not a de Polignac number, because 1213713 - 2¹² = 1209617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1213763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67420 + ... + 67437.

2^1213713 is an apocalyptic number.

It is an amenable number.

1213713 is a deficient number, since it is larger than the sum of its proper divisors (539441).

1213713 is a wasteful number, since it uses less digits than its factorization.

1213713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134863 (or 134860 counting only the distinct ones).

The product of its digits is 126, while the sum is 18.

The square root of 1213713 is about 1101.6864345176. The cubic root of 1213713 is about 106.6691091021.

Adding to 1213713 its reverse (3173121), we get a palindrome (4386834).

The spelling of 1213713 in words is "one million, two hundred thirteen thousand, seven hundred thirteen".