1225312667 has 2 divisors, whose sum is σ = 1225312668. Its totient is φ = 1225312666.

The previous prime is 1225312663. The next prime is 1225312687. The reversal of 1225312667 is 7662135221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225312667 - 2² = 1225312663 is a prime.

It is a super-2 number, since 2×1225312667² = 3002782263821305778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1225312663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612656333 + 612656334.

It is an arithmetic number, because the mean of its divisors is an integer number (612656334).

Almost surely, 2^1225312667 is an apocalyptic number.

1225312667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225312667 is an equidigital number, since it uses as much as digits as its factorization.

1225312667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 1225312667 is about 35004.4663864485. The cubic root of 1225312667 is about 1070.0785067736.

Adding to 1225312667 its reverse (7662135221), we get a palindrome (8887447888).

The spelling of 1225312667 in words is "one billion, two hundred twenty-five million, three hundred twelve thousand, six hundred sixty-seven".