1275632656 has 15 divisors (see below), whose sum is σ = 2471815101. Its totient is φ = 637744896.

The previous prime is 1275632653. The next prime is 1275632669. The reversal of 1275632656 is 6562365721.

The square root of 1275632656 is 35716.

It is a perfect power (a square), and thus also a powerful number.

1275632656 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in only one way, i.e., 47831056 + 1227801600 = 6916^2 + 35040^2 .

It is a super-2 number, since 2×1275632656² = 3254477346107228672, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275632651) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 138400 + ... + 147328.

Almost surely, 2^1275632656 is an apocalyptic number.

1275632656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1275632656 is the 35716-th square number.

It is an amenable number.

1275632656 is a deficient number, since it is larger than the sum of its proper divisors (1196182445).

1275632656 is an frugal number, since it uses more digits than its factorization.

1275632656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17866 (or 8931 counting only the distinct ones).

The product of its digits is 453600, while the sum is 43.

The cubic root of 1275632656 is about 1084.5307649805.

The spelling of 1275632656 in words is "one billion, two hundred seventy-five million, six hundred thirty-two thousand, six hundred fifty-six".