1980187 has 8 divisors (see below), whose sum is σ = 2230272. Its totient is φ = 1741800.

The previous prime is 1980169. The next prime is 1980191. The reversal of 1980187 is 7810891.

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 1980187 - 2¹⁵ = 1947419 is a prime.

It is a super-2 number, since 2×1980187² = 7842281109938, which contains 22 as substring.

1980187 is a lucky number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1920187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2563 + ... + 3244.

It is an arithmetic number, because the mean of its divisors is an integer number (278784).

2^1980187 is an apocalyptic number.

1980187 is a deficient number, since it is larger than the sum of its proper divisors (250085).

1980187 is a wasteful number, since it uses less digits than its factorization.

1980187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5849.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 1980187 is about 1407.1911739348. The cubic root of 1980187 is about 125.5746765924.

It can be divided in two parts, 198018 and 7, that added together give a square (198025 = 445²).

The spelling of 1980187 in words is "one million, nine hundred eighty thousand, one hundred eighty-seven".