1820485 has 8 divisors (see below), whose sum is σ = 2299680. Its totient is φ = 1379664.

The previous prime is 1820471. The next prime is 1820501. The reversal of 1820485 is 5840281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1820485 - 2¹¹ = 1818437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9487 + ... + 9676.

It is an arithmetic number, because the mean of its divisors is an integer number (287460).

2^1820485 is an apocalyptic number.

It is an amenable number.

1820485 is a deficient number, since it is larger than the sum of its proper divisors (479195).

1820485 is a wasteful number, since it uses less digits than its factorization.

1820485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19187.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1820485 is about 1349.2534973088. The cubic root of 1820485 is about 122.1037592612.

It can be divided in two parts, 18 and 20485, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 1820485 in words is "one million, eight hundred twenty thousand, four hundred eighty-five".