1804145 has 16 divisors (see below), whose sum is σ = 2605440. Its totient is φ = 1171584.

The previous prime is 1804139. The next prime is 1804199. The reversal of 1804145 is 5414081.

It is a cyclic number.

It is not a de Polignac number, because 1804145 - 2⁴ = 1804129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1804145.

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, 692 + ... + 2021.

It is an arithmetic number, because the mean of its divisors is an integer number (162840).

2^1804145 is an apocalyptic number.

It is an amenable number.

1804145 is a deficient number, since it is larger than the sum of its proper divisors (801295).

1804145 is a wasteful number, since it uses less digits than its factorization.

1804145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1804145 is about 1343.1846485126. The cubic root of 1804145 is about 121.7373413945.

The spelling of 1804145 in words is "one million, eight hundred four thousand, one hundred forty-five".