1291801 has 8 divisors (see below), whose sum is σ = 1524224. Its totient is φ = 1071360.

The previous prime is 1291799. The next prime is 1291817. The reversal of 1291801 is 1081921.

1291801 = T₁₁₈ + T₁₁₉ + ... + T₂₁₀.

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

It is not a de Polignac number, because 1291801 - 2¹ = 1291799 is a prime.

It is a Duffinian number.

1291801 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1291831) 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 7 ways as a sum of consecutive naturals, for example, 2760 + ... + 3193.

It is an arithmetic number, because the mean of its divisors is an integer number (190528).

2^1291801 is an apocalyptic number.

It is an amenable number.

1291801 is a deficient number, since it is larger than the sum of its proper divisors (232423).

1291801 is an equidigital number, since it uses as much as digits as its factorization.

1291801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5991.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1291801 is about 1136.5742386664. The cubic root of 1291801 is about 108.9093598809.

The spelling of 1291801 in words is "one million, two hundred ninety-one thousand, eight hundred one".