1281332 has 24 divisors (see below), whose sum is σ = 2477832. Its totient is φ = 576000.

The previous prime is 1281331. The next prime is 1281349. The reversal of 1281332 is 2331821.

It can be written as a sum of positive squares in 4 ways, for example, as 13456 + 1267876 = 116^2 + 1126^2 .

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1832 + ... + 2432.

It is an arithmetic number, because the mean of its divisors is an integer number (103243).

2^1281332 is an apocalyptic number.

It is an amenable number.

1281332 is a deficient number, since it is larger than the sum of its proper divisors (1196500).

1281332 is a wasteful number, since it uses less digits than its factorization.

1281332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 657 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 1281332 is about 1131.9593632282. The cubic root of 1281332 is about 108.6143541516.

The spelling of 1281332 in words is "one million, two hundred eighty-one thousand, three hundred thirty-two".