1980185 has 16 divisors (see below), whose sum is σ = 2526336. Its totient is φ = 1486848.

The previous prime is 1980169. The next prime is 1980191. The reversal of 1980185 is 5810891.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1980185 - 2⁴ = 1980169 is a prime.

It is a super-2 number, since 2×1980185² = 7842265268450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7577 + ... + 7833.

It is an arithmetic number, because the mean of its divisors is an integer number (157896).

2^1980185 is an apocalyptic number.

It is an amenable number.

1980185 is a deficient number, since it is larger than the sum of its proper divisors (546151).

1980185 is a wasteful number, since it uses less digits than its factorization.

1980185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 1980185 is about 1407.1904632991. The cubic root of 1980185 is about 125.5746343153.

The spelling of 1980185 in words is "one million, nine hundred eighty thousand, one hundred eighty-five".