1290085 has 8 divisors (see below), whose sum is σ = 1571616. Its totient is φ = 1016400.

The previous prime is 1290083. The next prime is 1290109. The reversal of 1290085 is 5800921.

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

It is not a de Polignac number, because 1290085 - 2¹ = 1290083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1591 + ... + 2260.

It is an arithmetic number, because the mean of its divisors is an integer number (196452).

2^1290085 is an apocalyptic number.

It is an amenable number.

1290085 is a deficient number, since it is larger than the sum of its proper divisors (281531).

1290085 is an equidigital number, since it uses as much as digits as its factorization.

1290085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1290085 is about 1135.8190877072. The cubic root of 1290085 is about 108.8611142467.

The spelling of 1290085 in words is "one million, two hundred ninety thousand, eighty-five".