1282640979 has 8 divisors (see below), whose sum is σ = 1711342480. Its totient is φ = 854516736.

The previous prime is 1282640963. The next prime is 1282641049. The reversal of 1282640979 is 9790462821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1282640979 - 2⁴ = 1282640963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1282640959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139102 + ... + 148035.

It is an arithmetic number, because the mean of its divisors is an integer number (213917810).

Almost surely, 2^1282640979 is an apocalyptic number.

1282640979 is a deficient number, since it is larger than the sum of its proper divisors (428701501).

1282640979 is a wasteful number, since it uses less digits than its factorization.

1282640979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288629.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1282640979 is about 35813.9774250222. The cubic root of 1282640979 is about 1086.5132753092.

The spelling of 1282640979 in words is "one billion, two hundred eighty-two million, six hundred forty thousand, nine hundred seventy-nine".