1281132 has 36 divisors (see below), whose sum is σ = 3410680. Its totient is φ = 404352.

The previous prime is 1281131. The next prime is 1281149. The reversal of 1281132 is 2311821.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1281131) 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, 253 + ... + 1620.

2^1281132 is an apocalyptic number.

1281132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1281132 is an abundant number, since it is smaller than the sum of its proper divisors (2129548).

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

1281132 is a wasteful number, since it uses less digits than its factorization.

1281132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902 (or 1897 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1281132 is about 1131.8710173867. The cubic root of 1281132 is about 108.6087027406.

Adding to 1281132 its reverse (2311821), we get a palindrome (3592953).

The spelling of 1281132 in words is "one million, two hundred eighty-one thousand, one hundred thirty-two".