1810401 has 4 divisors (see below), whose sum is σ = 2413872. Its totient is φ = 1206932.

The previous prime is 1810397. The next prime is 1810409. The reversal of 1810401 is 1040181.

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.

It is a cyclic number.

It is not a de Polignac number, because 1810401 - 2² = 1810397 is a prime.

It is a D-number.

It is a Curzon number.

1810401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1810409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301731 + ... + 301736.

It is an arithmetic number, because the mean of its divisors is an integer number (603468).

2^1810401 is an apocalyptic number.

It is an amenable number.

1810401 is a deficient number, since it is larger than the sum of its proper divisors (603471).

1810401 is an equidigital number, since it uses as much as digits as its factorization.

1810401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603470.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1810401 is about 1345.5114269303. The cubic root of 1810401 is about 121.8778900038.

Adding to 1810401 its reverse (1040181), we get a palindrome (2850582).

It can be divided in two parts, 1810 and 401, that added together give a triangular number (2211 = T₆₆).

The spelling of 1810401 in words is "one million, eight hundred ten thousand, four hundred one".