1291304 has 16 divisors (see below), whose sum is σ = 2767200. Its totient is φ = 553392.

The previous prime is 1291271. The next prime is 1291313. The reversal of 1291304 is 4031921.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11474 + ... + 11585.

It is an arithmetic number, because the mean of its divisors is an integer number (172950).

2^1291304 is an apocalyptic number.

1291304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1291304 is an abundant number, since it is smaller than the sum of its proper divisors (1475896).

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

1291304 is a wasteful number, since it uses less digits than its factorization.

1291304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23072 (or 23068 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1291304 is about 1136.3555781532. The cubic root of 1291304 is about 108.8953910381.

The spelling of 1291304 in words is "one million, two hundred ninety-one thousand, three hundred four".