1285460720 has 20 divisors (see below), whose sum is σ = 2988696360. Its totient is φ = 514184256.

The previous prime is 1285460717. The next prime is 1285460807. The reversal of 1285460720 is 270645821.

It is a tau number, because it is divible by the number of its divisors (20).

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, 8034050 + ... + 8034209.

It is an arithmetic number, because the mean of its divisors is an integer number (149434818).

Almost surely, 2^1285460720 is an apocalyptic number.

1285460720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285460720 is an abundant number, since it is smaller than the sum of its proper divisors (1703235640).

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

1285460720 is a wasteful number, since it uses less digits than its factorization.

1285460720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16068272 (or 16068266 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1285460720 is about 35853.3223007297. The cubic root of 1285460720 is about 1087.3088847228.

The spelling of 1285460720 in words is "one billion, two hundred eighty-five million, four hundred sixty thousand, seven hundred twenty".