1279521360 has 480 divisors, whose sum is σ = 4936434048. Its totient is φ = 306063360.

The previous prime is 1279521343. The next prime is 1279521379. The reversal of 1279521360 is 631259721.

1279521360 is a `hidden beast` number, since 1 + 2 + 79 + 521 + 3 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 15415879 + ... + 15415961.

Almost surely, 2^1279521360 is an apocalyptic number.

1279521360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279521360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2468217024).

1279521360 is an abundant number, since it is smaller than the sum of its proper divisors (3656912688).

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

1279521360 is a wasteful number, since it uses less digits than its factorization.

1279521360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1279521360 is about 35770.3978171896. The cubic root of 1279521360 is about 1085.6316934270.

The spelling of 1279521360 in words is "one billion, two hundred seventy-nine million, five hundred twenty-one thousand, three hundred sixty".