1213311 has 8 divisors (see below), whose sum is σ = 1764864. Its totient is φ = 735320.

The previous prime is 1213301. The next prime is 1213327. The reversal of 1213311 is 1133121.

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 1213311 - 2⁷ = 1213183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18351 + ... + 18416.

It is an arithmetic number, because the mean of its divisors is an integer number (220608).

2^1213311 is an apocalyptic number.

1213311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213311 is a deficient number, since it is larger than the sum of its proper divisors (551553).

1213311 is a wasteful number, since it uses less digits than its factorization.

1213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36781.

The product of its digits is 18, while the sum is 12.

The square root of 1213311 is about 1101.5039718494. The cubic root of 1213311 is about 106.6573309972.

Adding to 1213311 its reverse (1133121), we get a palindrome (2346432).

It can be divided in two parts, 1 and 213311, that added together give a palindrome (213312).

The spelling of 1213311 in words is "one million, two hundred thirteen thousand, three hundred eleven".