1856249 has 4 divisors (see below), whose sum is σ = 1916160. Its totient is φ = 1796340.

The previous prime is 1856237. The next prime is 1856269. The reversal of 1856249 is 9426581.

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 1856249 - 2⁴ = 1856233 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1856269) 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, 29909 + ... + 29970.

It is an arithmetic number, because the mean of its divisors is an integer number (479040).

2^1856249 is an apocalyptic number.

It is an amenable number.

1856249 is a deficient number, since it is larger than the sum of its proper divisors (59911).

1856249 is an equidigital number, since it uses as much as digits as its factorization.

1856249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59910.

The product of its digits is 17280, while the sum is 35.

The square root of 1856249 is about 1362.4422923559. The cubic root of 1856249 is about 122.8981685208.

The spelling of 1856249 in words is "one million, eight hundred fifty-six thousand, two hundred forty-nine".