1291465 has 8 divisors (see below), whose sum is σ = 1771200. Its totient is φ = 885552.

The previous prime is 1291453. The next prime is 1291471. The reversal of 1291465 is 5641921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1291465 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18415 + ... + 18484.

It is an arithmetic number, because the mean of its divisors is an integer number (221400).

2^1291465 is an apocalyptic number.

It is an amenable number.

1291465 is a deficient number, since it is larger than the sum of its proper divisors (479735).

1291465 is an equidigital number, since it uses as much as digits as its factorization.

1291465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36911.

The product of its digits is 2160, while the sum is 28.

The square root of 1291465 is about 1136.4264164476. The cubic root of 1291465 is about 108.8999165486.

It can be divided in two parts, 1 and 291465, that added together give a triangular number (291466 = T₇₆₃).

The spelling of 1291465 in words is "one million, two hundred ninety-one thousand, four hundred sixty-five".