1216434 has 16 divisors (see below), whose sum is σ = 2517120. Its totient is φ = 391440.

The previous prime is 1216433. The next prime is 1216441. The reversal of 1216434 is 4346121.

It is a Curzon number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1216434.

It is not an unprimeable number, because it can be changed into a prime (1216433) 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 7 ways as a sum of consecutive naturals, for example, 3322 + ... + 3669.

It is an arithmetic number, because the mean of its divisors is an integer number (157320).

2^1216434 is an apocalyptic number.

1216434 is an abundant number, since it is smaller than the sum of its proper divisors (1300686).

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

1216434 is a wasteful number, since it uses less digits than its factorization.

1216434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025.

The product of its digits is 576, while the sum is 21.

The square root of 1216434 is about 1102.9206680446. The cubic root of 1216434 is about 106.7487627533.

It can be divided in two parts, 121 and 6434, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 1216434 in words is "one million, two hundred sixteen thousand, four hundred thirty-four".