1225134656 has 28 divisors (see below), whose sum is σ = 2433637500. Its totient is φ = 611934720.

The previous prime is 1225134641. The next prime is 1225134679. The reversal of 1225134656 is 6564315221.

It can be written as a sum of positive squares in 2 ways, for example, as 751637056 + 473497600 = 27416^2 + 21760^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55970 + ... + 74718.

It is an arithmetic number, because the mean of its divisors is an integer number (86915625).

Almost surely, 2^1225134656 is an apocalyptic number.

1225134656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1225134656 is a deficient number, since it is larger than the sum of its proper divisors (1208502844).

1225134656 is a wasteful number, since it uses less digits than its factorization.

1225134656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19782 (or 19772 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1225134656 is about 35001.9236042821. The cubic root of 1225134656 is about 1070.0266846345.

Adding to 1225134656 its reverse (6564315221), we get a palindrome (7789449877).

The spelling of 1225134656 in words is "one billion, two hundred twenty-five million, one hundred thirty-four thousand, six hundred fifty-six".