1216430 has 16 divisors (see below), whose sum is σ = 2212704. Its totient is φ = 481440.

The previous prime is 1216421. The next prime is 1216433. The reversal of 1216430 is 346121.

It is a junction number, because it is equal to n+sod(n) for n = 1216399 and 1216408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216433) 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, 440 + ... + 1620.

It is an arithmetic number, because the mean of its divisors is an integer number (138294).

2^1216430 is an apocalyptic number.

1216430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216430 is a deficient number, since it is larger than the sum of its proper divisors (996274).

1216430 is a wasteful number, since it uses less digits than its factorization.

1216430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1216430 is about 1102.9188546761. The cubic root of 1216430 is about 106.7486457459.

The spelling of 1216430 in words is "one million, two hundred sixteen thousand, four hundred thirty".