1897112 has 32 divisors (see below), whose sum is σ = 4281600. Its totient is φ = 769824.

The previous prime is 1897099. The next prime is 1897121. The reversal of 1897112 is 2117981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173 + ... + 1955.

It is an arithmetic number, because the mean of its divisors is an integer number (133800).

2^1897112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1897112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2140800).

1897112 is an abundant number, since it is smaller than the sum of its proper divisors (2384488).

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

1897112 is a wasteful number, since it uses less digits than its factorization.

1897112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815 (or 1811 counting only the distinct ones).

The product of its digits is 1008, while the sum is 29.

The square root of 1897112 is about 1377.3568891177. The cubic root of 1897112 is about 123.7934473162.

The spelling of 1897112 in words is "one million, eight hundred ninety-seven thousand, one hundred twelve".