1213844 has 12 divisors (see below), whose sum is σ = 2153844. Its totient is φ = 598464.

The previous prime is 1213841. The next prime is 1213873. The reversal of 1213844 is 4483121.

It can be written as a sum of positive squares in 2 ways, for example, as 620944 + 592900 = 788^2 + 770^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213841) 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, 1787 + ... + 2370.

It is an arithmetic number, because the mean of its divisors is an integer number (179487).

2^1213844 is an apocalyptic number.

It is an amenable number.

1213844 is a deficient number, since it is larger than the sum of its proper divisors (940000).

1213844 is a wasteful number, since it uses less digits than its factorization.

1213844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4234 (or 4232 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 1213844 is about 1101.7458872172. The cubic root of 1213844 is about 106.6729466789.

Adding to 1213844 its reverse (4483121), we get a palindrome (5696965).

It can be divided in two parts, 121 and 3844, that multiplied together give a square (465124 = 682²).

The spelling of 1213844 in words is "one million, two hundred thirteen thousand, eight hundred forty-four".