1224563971 has 2 divisors, whose sum is σ = 1224563972. Its totient is φ = 1224563970.

The previous prime is 1224563969. The next prime is 1224564053. The reversal of 1224563971 is 1793654221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1224563971 - 2¹ = 1224563969 is a prime.

Together with 1224563969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1224563671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612281985 + 612281986.

It is an arithmetic number, because the mean of its divisors is an integer number (612281986).

Almost surely, 2^1224563971 is an apocalyptic number.

1224563971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224563971 is an equidigital number, since it uses as much as digits as its factorization.

1224563971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 1224563971 is about 34993.7704598976. The cubic root of 1224563971 is about 1069.8605143239.

The spelling of 1224563971 in words is "one billion, two hundred twenty-four million, five hundred sixty-three thousand, nine hundred seventy-one".