1281456 has 60 divisors (see below), whose sum is σ = 3917160. Its totient is φ = 387840.

The previous prime is 1281451. The next prime is 1281457. The reversal of 1281456 is 6541821.

It is not an unprimeable number, because it can be changed into a prime (1281451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1180 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (65286).

2^1281456 is an apocalyptic number.

1281456 is a gapful number since it is divisible by the number (16) 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 1281456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1958580).

1281456 is an abundant number, since it is smaller than the sum of its proper divisors (2635704).

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

1281456 is a wasteful number, since it uses less digits than its factorization.

1281456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 825 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1281456 is about 1132.0141341874. The cubic root of 1281456 is about 108.6178577311.

The spelling of 1281456 in words is "one million, two hundred eighty-one thousand, four hundred fifty-six".