1279828451 has 4 divisors (see below), whose sum is σ = 1396176504. Its totient is φ = 1163480400.

The previous prime is 1279828447. The next prime is 1279828453. The reversal of 1279828451 is 1548289721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1548289721 = 11 ⋅140753611.

It is a cyclic number.

It is not a de Polignac number, because 1279828451 - 2² = 1279828447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1279828396 and 1279828405.

It is not an unprimeable number, because it can be changed into a prime (1279828453) by changing a digit.

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, 58174010 + ... + 58174031.

It is an arithmetic number, because the mean of its divisors is an integer number (349044126).

Almost surely, 2^1279828451 is an apocalyptic number.

1279828451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1279828451 is a deficient number, since it is larger than the sum of its proper divisors (116348053).

1279828451 is a wasteful number, since it uses less digits than its factorization.

1279828451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116348052.

The product of its digits is 322560, while the sum is 47.

The square root of 1279828451 is about 35774.6900895032. The cubic root of 1279828451 is about 1085.7185386763.

The spelling of 1279828451 in words is "one billion, two hundred seventy-nine million, eight hundred twenty-eight thousand, four hundred fifty-one".