1855164 has 24 divisors (see below), whose sum is σ = 4469248. Its totient is φ = 598320.

The previous prime is 1855153. The next prime is 1855169. The reversal of 1855164 is 4615581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1855169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2122 + ... + 2865.

2^1855164 is an apocalyptic number.

It is an amenable number.

1855164 is an abundant number, since it is smaller than the sum of its proper divisors (2614084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1855164 is a wasteful number, since it uses less digits than its factorization.

1855164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025 (or 5023 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 1855164 is about 1362.0440521510. The cubic root of 1855164 is about 122.8742186984.

The spelling of 1855164 in words is "one million, eight hundred fifty-five thousand, one hundred sixty-four".