1974197 has 6 divisors (see below), whose sum is σ = 2021922. Its totient is φ = 1926912.

The previous prime is 1974163. The next prime is 1974221. The reversal of 1974197 is 7914791.

It can be written as a sum of positive squares in 3 ways, for example, as 108241 + 1865956 = 329^2 + 1366^2 .

It is not a de Polignac number, because 1974197 - 2¹⁶ = 1908661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1974197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10133 + ... + 10325.

It is an arithmetic number, because the mean of its divisors is an integer number (336987).

2^1974197 is an apocalyptic number.

It is an amenable number.

1974197 is a deficient number, since it is larger than the sum of its proper divisors (47725).

1974197 is an frugal number, since it uses more digits than its factorization.

1974197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 246 counting only the distinct ones).

The product of its digits is 15876, while the sum is 38.

The square root of 1974197 is about 1405.0612086311. The cubic root of 1974197 is about 125.4479289599.

The spelling of 1974197 in words is "one million, nine hundred seventy-four thousand, one hundred ninety-seven".