1291461 has 4 divisors (see below), whose sum is σ = 1721952. Its totient is φ = 860972.

The previous prime is 1291453. The next prime is 1291471. The reversal of 1291461 is 1641921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1291461 - 2³ = 1291453 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291421) 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, 215241 + ... + 215246.

It is an arithmetic number, because the mean of its divisors is an integer number (430488).

2^1291461 is an apocalyptic number.

It is an amenable number.

1291461 is a deficient number, since it is larger than the sum of its proper divisors (430491).

1291461 is an equidigital number, since it uses as much as digits as its factorization.

1291461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430490.

The product of its digits is 432, while the sum is 24.

The square root of 1291461 is about 1136.4246565435. The cubic root of 1291461 is about 108.8998041181.

The spelling of 1291461 in words is "one million, two hundred ninety-one thousand, four hundred sixty-one".