1278648075 has 18 divisors (see below), whose sum is σ = 2114543604. Its totient is φ = 681780480.

The previous prime is 1278648067. The next prime is 1278648089. The reversal of 1278648075 is 5708468721.

It is not a de Polignac number, because 1278648075 - 2³ = 1278648067 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 307611 + ... + 311739.

Almost surely, 2^1278648075 is an apocalyptic number.

1278648075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1278648075 is a deficient number, since it is larger than the sum of its proper divisors (835895529).

1278648075 is an frugal number, since it uses more digits than its factorization.

1278648075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8271 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 48.

The square root of 1278648075 is about 35758.1889222595. The cubic root of 1278648075 is about 1085.3846527047.

Multiplying 1278648075 by its sum of digits (48), we get a square (61375107600 = 247740²).

The spelling of 1278648075 in words is "one billion, two hundred seventy-eight million, six hundred forty-eight thousand, seventy-five".