1290081 has 16 divisors (see below), whose sum is σ = 1951040. Its totient is φ = 751680.

The previous prime is 1290077. The next prime is 1290083. The reversal of 1290081 is 1800921.

It is not a de Polignac number, because 1290081 - 2² = 1290077 is a prime.

It is a super-2 number, since 2×1290081² = 3328617973122, which contains 22 as substring.

1290081 is a lucky number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130 + ... + 1611.

It is an arithmetic number, because the mean of its divisors is an integer number (121940).

2^1290081 is an apocalyptic number.

It is an amenable number.

1290081 is a deficient number, since it is larger than the sum of its proper divisors (660959).

1290081 is a wasteful number, since it uses less digits than its factorization.

1290081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1290081 is about 1135.8173268620. The cubic root of 1290081 is about 108.8610017360.

The spelling of 1290081 in words is "one million, two hundred ninety thousand, eighty-one".