1291064 has 16 divisors (see below), whose sum is σ = 2455920. Its totient is φ = 636160.

The previous prime is 1291063. The next prime is 1291079. The reversal of 1291064 is 4601921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291063) 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 3 ways as a sum of consecutive naturals, for example, 569 + ... + 1704.

It is an arithmetic number, because the mean of its divisors is an integer number (153495).

2^1291064 is an apocalyptic number.

It is an amenable number.

1291064 is a deficient number, since it is larger than the sum of its proper divisors (1164856).

1291064 is a wasteful number, since it uses less digits than its factorization.

1291064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350 (or 2346 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1291064 is about 1136.2499724972. The cubic root of 1291064 is about 108.8886442372. Note that the first 3 decimals are identical.

Adding to 1291064 its reverse (4601921), we get a palindrome (5892985).

The spelling of 1291064 in words is "one million, two hundred ninety-one thousand, sixty-four".