1855489 has 4 divisors (see below), whose sum is σ = 1859760. Its totient is φ = 1851220.

The previous prime is 1855463. The next prime is 1855501. The reversal of 1855489 is 9845581.

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 1855489 - 2⁵ = 1855457 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1855589) 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, 1399 + ... + 2380.

It is an arithmetic number, because the mean of its divisors is an integer number (464940).

It is a Proth number, since it is equal to 453 ⋅ 2¹² + 1 and 453 < 2¹².

2^1855489 is an apocalyptic number.

It is an amenable number.

1855489 is a deficient number, since it is larger than the sum of its proper divisors (4271).

1855489 is an equidigital number, since it uses as much as digits as its factorization.

1855489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270.

The product of its digits is 57600, while the sum is 40.

The square root of 1855489 is about 1362.1633529060. The cubic root of 1855489 is about 122.8813935878.

The spelling of 1855489 in words is "one million, eight hundred fifty-five thousand, four hundred eighty-nine".