1281960 has 64 divisors (see below), whose sum is σ = 4276800. Its totient is φ = 341568.

The previous prime is 1281941. The next prime is 1281961. The reversal of 1281960 is 691821.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1281961) 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 15 ways as a sum of consecutive naturals, for example, 487 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (66825).

2^1281960 is an apocalyptic number.

1281960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2138400).

1281960 is an abundant number, since it is smaller than the sum of its proper divisors (2994840).

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

1281960 is a wasteful number, since it uses less digits than its factorization.

1281960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207 (or 1197 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1281960 is about 1132.2367243647. The cubic root of 1281960 is about 108.6320957605.

It can be divided in two parts, 1 and 281960, that added together give a square (281961 = 531²).

The spelling of 1281960 in words is "one million, two hundred eighty-one thousand, nine hundred sixty".