1856245 has 4 divisors (see below), whose sum is σ = 2227500. Its totient is φ = 1484992.

The previous prime is 1856237. The next prime is 1856269. The reversal of 1856245 is 5426581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1094116 + 762129 = 1046^2 + 873^2 .

It is a cyclic number.

It is not a de Polignac number, because 1856245 - 2³ = 1856237 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185620 + ... + 185629.

It is an arithmetic number, because the mean of its divisors is an integer number (556875).

2^1856245 is an apocalyptic number.

It is an amenable number.

1856245 is a deficient number, since it is larger than the sum of its proper divisors (371255).

1856245 is an equidigital number, since it uses as much as digits as its factorization.

1856245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371254.

The product of its digits is 9600, while the sum is 31.

The square root of 1856245 is about 1362.4408244030. The cubic root of 1856245 is about 122.8980802437.

The spelling of 1856245 in words is "one million, eight hundred fifty-six thousand, two hundred forty-five".