1279421286 has 64 divisors (see below), whose sum is σ = 3013307136. Its totient is φ = 357033600.

The previous prime is 1279421281. The next prime is 1279421293. The reversal of 1279421286 is 6821249721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279421281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419760 + ... + 422796.

It is an arithmetic number, because the mean of its divisors is an integer number (47082924).

Almost surely, 2^1279421286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279421286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506653568).

1279421286 is an abundant number, since it is smaller than the sum of its proper divisors (1733885850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279421286 is a wasteful number, since it uses less digits than its factorization.

1279421286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557.

The product of its digits is 96768, while the sum is 42.

The square root of 1279421286 is about 35768.9989516061. The cubic root of 1279421286 is about 1085.6033895258.

The spelling of 1279421286 in words is "one billion, two hundred seventy-nine million, four hundred twenty-one thousand, two hundred eighty-six".