1225312664 has 8 divisors (see below), whose sum is σ = 2297461260. Its totient is φ = 612656328.

The previous prime is 1225312663. The next prime is 1225312667. The reversal of 1225312664 is 4662135221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1225312664² = 3002782249117553792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1225312664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225312663) 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 as a sum of consecutive naturals, namely, 76582034 + ... + 76582049.

Almost surely, 2^1225312664 is an apocalyptic number.

It is an amenable number.

1225312664 is a deficient number, since it is larger than the sum of its proper divisors (1072148596).

1225312664 is a wasteful number, since it uses less digits than its factorization.

1225312664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153164089 (or 153164085 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 1225312664 is about 35004.4663435968. The cubic root of 1225312664 is about 1070.0785059003.

Adding to 1225312664 its reverse (4662135221), we get a palindrome (5887447885).

The spelling of 1225312664 in words is "one billion, two hundred twenty-five million, three hundred twelve thousand, six hundred sixty-four".