1285056770 has 8 divisors (see below), whose sum is σ = 2313102204. Its totient is φ = 514022704.

The previous prime is 1285056769. The next prime is 1285056793. The reversal of 1285056770 is 776505821.

It can be written as a sum of positive squares in 2 ways, for example, as 1271136409 + 13920361 = 35653^2 + 3731^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 64252829 + ... + 64252848.

Almost surely, 2^1285056770 is an apocalyptic number.

1285056770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1285056770 is a deficient number, since it is larger than the sum of its proper divisors (1028045434).

1285056770 is a wasteful number, since it uses less digits than its factorization.

1285056770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128505684.

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 1285056770 is about 35847.6884889389. The cubic root of 1285056770 is about 1087.1949788854.

The spelling of 1285056770 in words is "one billion, two hundred eighty-five million, fifty-six thousand, seven hundred seventy".