1211713 has 4 divisors (see below), whose sum is σ = 1244500. Its totient is φ = 1178928.

The previous prime is 1211701. The next prime is 1211719. The reversal of 1211713 is 3171121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 725904 + 485809 = 852^2 + 697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16338 + ... + 16411.

It is an arithmetic number, because the mean of its divisors is an integer number (311125).

2^1211713 is an apocalyptic number.

It is an amenable number.

1211713 is a deficient number, since it is larger than the sum of its proper divisors (32787).

1211713 is an equidigital number, since it uses as much as digits as its factorization.

1211713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32786.

The product of its digits is 42, while the sum is 16.

The square root of 1211713 is about 1100.7783609792. The cubic root of 1211713 is about 106.6104858230.

Adding to 1211713 its reverse (3171121), we get a palindrome (4382834).

The spelling of 1211713 in words is "one million, two hundred eleven thousand, seven hundred thirteen".