1275035648 has 64 divisors (see below), whose sum is σ = 2576311920. Its totient is φ = 630980608.

The previous prime is 1275035621. The next prime is 1275035669. The reversal of 1275035648 is 8465305721.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5472140 + ... + 5472372.

Almost surely, 2^1275035648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275035648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288155960).

1275035648 is an abundant number, since it is smaller than the sum of its proper divisors (1301276272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275035648 is an frugal number, since it uses more digits than its factorization.

1275035648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 1275035648 is about 35707.6413110695. The cubic root of 1275035648 is about 1084.3615484029.

The spelling of 1275035648 in words is "one billion, two hundred seventy-five million, thirty-five thousand, six hundred forty-eight".