1290885 has 16 divisors (see below), whose sum is σ = 2116800. Its totient is φ = 671360.

The previous prime is 1290869. The next prime is 1290901. The reversal of 1290885 is 5880921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1290869) and next prime (1290901).

It is not a de Polignac number, because 1290885 - 2⁴ = 1290869 is a prime.

It is a super-3 number, since 3×1290885³ = 6453330651821712375, which contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

1290885 is a lucky number.

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, 435 + ... + 1664.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

2^1290885 is an apocalyptic number.

1290885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1290885 is a deficient number, since it is larger than the sum of its proper divisors (825915).

1290885 is a wasteful number, since it uses less digits than its factorization.

1290885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1290885 is about 1136.1712018882. The cubic root of 1290885 is about 108.8836117038.

The spelling of 1290885 in words is "one million, two hundred ninety thousand, eight hundred eighty-five".