1855245 has 16 divisors (see below), whose sum is σ = 3392640. Its totient is φ = 848064.

The previous prime is 1855237. The next prime is 1855247. The reversal of 1855245 is 5425581.

It is not a de Polignac number, because 1855245 - 2³ = 1855237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1855247) 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 15 ways as a sum of consecutive naturals, for example, 8730 + ... + 8939.

It is an arithmetic number, because the mean of its divisors is an integer number (212040).

2^1855245 is an apocalyptic number.

1855245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1855245 is a deficient number, since it is larger than the sum of its proper divisors (1537395).

1855245 is a wasteful number, since it uses less digits than its factorization.

1855245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17684.

The product of its digits is 8000, while the sum is 30.

The square root of 1855245 is about 1362.0737865476. The cubic root of 1855245 is about 122.8760069800.

The spelling of 1855245 in words is "one million, eight hundred fifty-five thousand, two hundred forty-five".