1213434 has 32 divisors (see below), whose sum is σ = 2816640. Its totient is φ = 386496.

The previous prime is 1213427. The next prime is 1213439. The reversal of 1213434 is 4343121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1213439) 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 15 ways as a sum of consecutive naturals, for example, 754 + ... + 1730.

It is an arithmetic number, because the mean of its divisors is an integer number (88020).

2^1213434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408320).

1213434 is an abundant number, since it is smaller than the sum of its proper divisors (1603206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213434 is a wasteful number, since it uses less digits than its factorization.

1213434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1005 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 1213434 is about 1101.5598031882. The cubic root of 1213434 is about 106.6609350219.

Adding to 1213434 its reverse (4343121), we get a palindrome (5556555).

It can be divided in two parts, 121 and 3434, that multiplied together give a palindrome (415514).

The spelling of 1213434 in words is "one million, two hundred thirteen thousand, four hundred thirty-four".