1279748128 has 12 divisors (see below), whose sum is σ = 2519504190. Its totient is φ = 639874048.

The previous prime is 1279748081. The next prime is 1279748147. The reversal of 1279748128 is 8218479721.

It can be written as a sum of positive squares in only one way, i.e., 684973584 + 594774544 = 26172^2 + 24388^2 .

It is a super-2 number, since 2×1279748128² = 3275510542239008768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19996033 + ... + 19996096.

Almost surely, 2^1279748128 is an apocalyptic number.

It is an amenable number.

1279748128 is a deficient number, since it is larger than the sum of its proper divisors (1239756062).

1279748128 is an equidigital number, since it uses as much as digits as its factorization.

1279748128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39992139 (or 39992131 counting only the distinct ones).

The product of its digits is 451584, while the sum is 49.

The square root of 1279748128 is about 35773.5674486065. The cubic root of 1279748128 is about 1085.6958246960.

The spelling of 1279748128 in words is "one billion, two hundred seventy-nine million, seven hundred forty-eight thousand, one hundred twenty-eight".