1989275 has 12 divisors (see below), whose sum is σ = 2520672. Its totient is φ = 1556640.

The previous prime is 1989263. The next prime is 1989277. The reversal of 1989275 is 5729891.

1989275 = T₈₂ + T₈₃ + ... + T₂₃₁.

It is not a de Polignac number, because 1989275 - 2⁴ = 1989259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1989277) 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 11 ways as a sum of consecutive naturals, for example, 329 + ... + 2021.

It is an arithmetic number, because the mean of its divisors is an integer number (210056).

2^1989275 is an apocalyptic number.

1989275 is a deficient number, since it is larger than the sum of its proper divisors (531397).

1989275 is a wasteful number, since it uses less digits than its factorization.

1989275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750 (or 1745 counting only the distinct ones).

The product of its digits is 45360, while the sum is 41.

The square root of 1989275 is about 1410.4166051206. The cubic root of 1989275 is about 125.7664903337.

The spelling of 1989275 in words is "one million, nine hundred eighty-nine thousand, two hundred seventy-five".