1290005 has 16 divisors (see below), whose sum is σ = 1678080. Its totient is φ = 948672.

The previous prime is 1289971. The next prime is 1290013. The reversal of 1290005 is 5000921.

1290005 = T₁₁₅ + T₁₁₆ + ... + T₂₀₉.

It is a cyclic number.

It is not a de Polignac number, because 1290005 - 2⁸ = 1289749 is a prime.

It is a super-2 number, since 2×1290005² = 3328225800050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3332 + ... + 3698.

It is an arithmetic number, because the mean of its divisors is an integer number (104880).

2^1290005 is an apocalyptic number.

It is an amenable number.

1290005 is a deficient number, since it is larger than the sum of its proper divisors (388075).

1290005 is a wasteful number, since it uses less digits than its factorization.

1290005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1290005 is about 1135.7838702852. The cubic root of 1290005 is about 108.8588639895.

Adding to 1290005 its reverse (5000921), we get a palindrome (6290926).

The spelling of 1290005 in words is "one million, two hundred ninety thousand, five".