1825801 has 4 divisors (see below), whose sum is σ = 1830400. Its totient is φ = 1821204.

The previous prime is 1825787. The next prime is 1825819. The reversal of 1825801 is 1085281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1085281 = 53 ⋅20477.

It is a cyclic number.

It is not a de Polignac number, because 1825801 - 2⁷ = 1825673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1825861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641 + ... + 2518.

It is an arithmetic number, because the mean of its divisors is an integer number (457600).

2^1825801 is an apocalyptic number.

It is an amenable number.

1825801 is a deficient number, since it is larger than the sum of its proper divisors (4599).

1825801 is an equidigital number, since it uses as much as digits as its factorization.

1825801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4598.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1825801 is about 1351.2220394887. Note that the first 3 decimals coincide. The cubic root of 1825801 is about 122.2224955305. Note that the first 3 decimals are identical.

The spelling of 1825801 in words is "one million, eight hundred twenty-five thousand, eight hundred one".