1810361 has 4 divisors (see below), whose sum is σ = 2068992. Its totient is φ = 1551732.

The previous prime is 1810357. The next prime is 1810363. The reversal of 1810361 is 1630181.

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 not a de Polignac number, because 1810361 - 2² = 1810357 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1810363) 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, 129305 + ... + 129318.

It is an arithmetic number, because the mean of its divisors is an integer number (517248).

2^1810361 is an apocalyptic number.

It is an amenable number.

1810361 is a deficient number, since it is larger than the sum of its proper divisors (258631).

1810361 is an equidigital number, since it uses as much as digits as its factorization.

1810361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258630.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1810361 is about 1345.4965626117. The cubic root of 1810361 is about 121.8769923847.

The spelling of 1810361 in words is "one million, eight hundred ten thousand, three hundred sixty-one".