1285960 has 32 divisors (see below), whose sum is σ = 3117240. Its totient is φ = 474624.

The previous prime is 1285943. The next prime is 1285969. The reversal of 1285960 is 695821.

It can be written as a sum of positive squares in 4 ways, for example, as 956484 + 329476 = 978^2 + 574^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1285969) by changing a digit.

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, 717 + ... + 1756.

2^1285960 is an apocalyptic number.

1285960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285960 is an abundant number, since it is smaller than the sum of its proper divisors (1831280).

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

1285960 is a wasteful number, since it uses less digits than its factorization.

1285960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2493 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1285960 is about 1134.0017636671. The cubic root of 1285960 is about 108.7449638748.

The spelling of 1285960 in words is "one million, two hundred eighty-five thousand, nine hundred sixty".