1804261 has 8 divisors (see below), whose sum is σ = 1923264. Its totient is φ = 1686720.

The previous prime is 1804249. The next prime is 1804267. The reversal of 1804261 is 1624081.

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

It is a cyclic number.

It is not a de Polignac number, because 1804261 - 2⁷ = 1804133 is a prime.

It is a super-2 number, since 2×1804261² = 6510715512242, which contains 22 as substring.

It is a Duffinian number.

1804261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804267) 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, 3336 + ... + 3838.

It is an arithmetic number, because the mean of its divisors is an integer number (240408).

2^1804261 is an apocalyptic number.

It is an amenable number.

1804261 is a deficient number, since it is larger than the sum of its proper divisors (119003).

1804261 is a wasteful number, since it uses less digits than its factorization.

1804261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1804261 is about 1343.2278287766. The cubic root of 1804261 is about 121.7399504289.

The spelling of 1804261 in words is "one million, eight hundred four thousand, two hundred sixty-one".