1897194 has 24 divisors (see below), whose sum is σ = 4110912. Its totient is φ = 583440.

The previous prime is 1897177. The next prime is 1897199. The reversal of 1897194 is 4917981.

1897194 = 376² + 377² + ... + 388².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897199) 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, 79 + ... + 1949.

It is an arithmetic number, because the mean of its divisors is an integer number (171288).

2^1897194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1897194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2055456).

1897194 is an abundant number, since it is smaller than the sum of its proper divisors (2213718).

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

1897194 is a wasteful number, since it uses less digits than its factorization.

1897194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902 (or 1889 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 1897194 is about 1377.3866559539. The cubic root of 1897194 is about 123.7952308897.

The spelling of 1897194 in words is "one million, eight hundred ninety-seven thousand, one hundred ninety-four".