1290001 has 4 divisors (see below), whose sum is σ = 1346112. Its totient is φ = 1233892.

The previous prime is 1289971. The next prime is 1290013. The reversal of 1290001 is 1000921.

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 1290001 - 2⁵ = 1289969 is a prime.

It is a Duffinian number.

1290001 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290031) 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, 28021 + ... + 28066.

It is an arithmetic number, because the mean of its divisors is an integer number (336528).

2^1290001 is an apocalyptic number.

It is an amenable number.

1290001 is a deficient number, since it is larger than the sum of its proper divisors (56111).

1290001 is an equidigital number, since it uses as much as digits as its factorization.

1290001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56110.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1290001 is about 1135.7821093854. The cubic root of 1290001 is about 108.8587514742.

Adding to 1290001 its reverse (1000921), we get a palindrome (2290922).

The spelling of 1290001 in words is "one million, two hundred ninety thousand, one".