1279454497 has 4 divisors (see below), whose sum is σ = 1279717056. Its totient is φ = 1279191940.

The previous prime is 1279454489. The next prime is 1279454513. The reversal of 1279454497 is 7944549721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7944549721 = 66431 ⋅119591.

It is a cyclic number.

It is not a de Polignac number, because 1279454497 - 2³ = 1279454489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279454417) 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, 123829 + ... + 133762.

It is an arithmetic number, because the mean of its divisors is an integer number (319929264).

Almost surely, 2^1279454497 is an apocalyptic number.

It is an amenable number.

1279454497 is a deficient number, since it is larger than the sum of its proper divisors (262559).

1279454497 is an equidigital number, since it uses as much as digits as its factorization.

1279454497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262558.

The product of its digits is 2540160, while the sum is 52.

The square root of 1279454497 is about 35769.4631913871. The cubic root of 1279454497 is about 1085.6127827472.

The spelling of 1279454497 in words is "one billion, two hundred seventy-nine million, four hundred fifty-four thousand, four hundred ninety-seven".