1889215 has 4 divisors (see below), whose sum is σ = 2267064. Its totient is φ = 1511368.

The previous prime is 1889213. The next prime is 1889219. The reversal of 1889215 is 5129881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5129881 = 827 ⋅6203.

It is a cyclic number.

It is not a de Polignac number, because 1889215 - 2¹ = 1889213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889213) 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, 188917 + ... + 188926.

It is an arithmetic number, because the mean of its divisors is an integer number (566766).

2^1889215 is an apocalyptic number.

1889215 is a deficient number, since it is larger than the sum of its proper divisors (377849).

1889215 is an equidigital number, since it uses as much as digits as its factorization.

1889215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377848.

The product of its digits is 5760, while the sum is 34.

The square root of 1889215 is about 1374.4871770955. The cubic root of 1889215 is about 123.6214391161.

The spelling of 1889215 in words is "one million, eight hundred eighty-nine thousand, two hundred fifteen".