1285166272 has 56 divisors (see below), whose sum is σ = 2908011456. Its totient is φ = 558256128.

The previous prime is 1285166263. The next prime is 1285166297. The reversal of 1285166272 is 2726615821.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31288 + ... + 59575.

It is an arithmetic number, because the mean of its divisors is an integer number (51928776).

Almost surely, 2^1285166272 is an apocalyptic number.

It is an amenable number.

1285166272 is an abundant number, since it is smaller than the sum of its proper divisors (1622845184).

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

1285166272 is a wasteful number, since it uses less digits than its factorization.

1285166272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90905 (or 90895 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 1285166272 is about 35849.2157794281. The cubic root of 1285166272 is about 1087.2258586219.

The spelling of 1285166272 in words is "one billion, two hundred eighty-five million, one hundred sixty-six thousand, two hundred seventy-two".