1285872726 has 8 divisors (see below), whose sum is σ = 2571745464. Its totient is φ = 428624240.

The previous prime is 1285872683. The next prime is 1285872733. The reversal of 1285872726 is 6272785821.

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

1285872726 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107156055 + ... + 107156066.

It is an arithmetic number, because the mean of its divisors is an integer number (321468183).

Almost surely, 2^1285872726 is an apocalyptic number.

1285872726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1285872726 is a wasteful number, since it uses less digits than its factorization.

1285872726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214312126.

The product of its digits is 752640, while the sum is 48.

The square root of 1285872726 is about 35859.0675561984. The cubic root of 1285872726 is about 1087.4250376127.

The spelling of 1285872726 in words is "one billion, two hundred eighty-five million, eight hundred seventy-two thousand, seven hundred twenty-six".