1281164 has 6 divisors (see below), whose sum is σ = 2242044. Its totient is φ = 640580.

The previous prime is 1281157. The next prime is 1281167. The reversal of 1281164 is 4611821.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1281167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160142 + ... + 160149.

It is an arithmetic number, because the mean of its divisors is an integer number (373674).

2^1281164 is an apocalyptic number.

It is an amenable number.

1281164 is a deficient number, since it is larger than the sum of its proper divisors (960880).

1281164 is a wasteful number, since it uses less digits than its factorization.

1281164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320295 (or 320293 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 1281164 is about 1131.8851531847. The cubic root of 1281164 is about 108.6096070059.

Adding to 1281164 its reverse (4611821), we get a palindrome (5892985).

The spelling of 1281164 in words is "one million, two hundred eighty-one thousand, one hundred sixty-four".