1216441 has 2 divisors, whose sum is σ = 1216442. Its totient is φ = 1216440.

The previous prime is 1216433. The next prime is 1216451. The reversal of 1216441 is 1446121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646416 + 570025 = 804^2 + 755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216441 - 2³ = 1216433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608220 + 608221.

It is an arithmetic number, because the mean of its divisors is an integer number (608221).

2^1216441 is an apocalyptic number.

It is an amenable number.

1216441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216441 is an equidigital number, since it uses as much as digits as its factorization.

1216441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 1216441 is about 1102.9238414324. The cubic root of 1216441 is about 106.7489675158.

The spelling of 1216441 in words is "one million, two hundred sixteen thousand, four hundred forty-one".