1275388648 has 8 divisors (see below), whose sum is σ = 2391353730. Its totient is φ = 637694320.

The previous prime is 1275388627. The next prime is 1275388669. The reversal of 1275388648 is 8468835721.

It is an interprime number because it is at equal distance from previous prime (1275388627) and next prime (1275388669).

It can be written as a sum of positive squares in only one way, i.e., 1268926884 + 6461764 = 35622^2 + 2542^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1275388595 and 1275388604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79711783 + ... + 79711798.

Almost surely, 2^1275388648 is an apocalyptic number.

It is an amenable number.

1275388648 is a deficient number, since it is larger than the sum of its proper divisors (1115965082).

1275388648 is a wasteful number, since it uses less digits than its factorization.

1275388648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159423587 (or 159423583 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The square root of 1275388648 is about 35712.5838885959. The cubic root of 1275388648 is about 1084.4616094764.

The spelling of 1275388648 in words is "one billion, two hundred seventy-five million, three hundred eighty-eight thousand, six hundred forty-eight".