1213246564 has 12 divisors (see below), whose sum is σ = 2133960444. Its totient is φ = 603543584.

The previous prime is 1213246561. The next prime is 1213246663. The reversal of 1213246564 is 4656423121.

It can be written as a sum of positive squares in 2 ways, for example, as 1128422464 + 84824100 = 33592^2 + 9210^2 .

It is not an unprimeable number, because it can be changed into a prime (1213246561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769039 + ... + 770614.

It is an arithmetic number, because the mean of its divisors is an integer number (177830037).

Almost surely, 2^1213246564 is an apocalyptic number.

It is an amenable number.

1213246564 is a deficient number, since it is larger than the sum of its proper divisors (920713880).

1213246564 is a wasteful number, since it uses less digits than its factorization.

1213246564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539854 (or 1539852 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 1213246564 is about 34831.6890776201. The cubic root of 1213246564 is about 1066.5544285984.

Adding to 1213246564 its reverse (4656423121), we get a palindrome (5869669685).

The spelling of 1213246564 in words is "one billion, two hundred thirteen million, two hundred forty-six thousand, five hundred sixty-four".