1224214391 has 2 divisors, whose sum is σ = 1224214392. Its totient is φ = 1224214390.

The previous prime is 1224214379. The next prime is 1224214417. The reversal of 1224214391 is 1934124221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1224214391 - 2¹⁴ = 1224198007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224214351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612107195 + 612107196.

It is an arithmetic number, because the mean of its divisors is an integer number (612107196).

Almost surely, 2^1224214391 is an apocalyptic number.

1224214391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224214391 is an equidigital number, since it uses as much as digits as its factorization.

1224214391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 1224214391 is about 34988.7752143455. The cubic root of 1224214391 is about 1069.7586991901.

The spelling of 1224214391 in words is "one billion, two hundred twenty-four million, two hundred fourteen thousand, three hundred ninety-one".