1213004651 has 2 divisors, whose sum is σ = 1213004652. Its totient is φ = 1213004650.

The previous prime is 1213004609. The next prime is 1213004657. The reversal of 1213004651 is 1564003121.

It is a strong prime.

It is an emirp because it is prime and its reverse (1564003121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213004651 - 2²⁶ = 1145895787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213004657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606502325 + 606502326.

It is an arithmetic number, because the mean of its divisors is an integer number (606502326).

Almost surely, 2^1213004651 is an apocalyptic number.

1213004651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213004651 is an equidigital number, since it uses as much as digits as its factorization.

1213004651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1213004651 is about 34828.2163051742. The cubic root of 1213004651 is about 1066.4835360198.

Adding to 1213004651 its reverse (1564003121), we get a palindrome (2777007772).

The spelling of 1213004651 in words is "one billion, two hundred thirteen million, four thousand, six hundred fifty-one".