1897345 has 8 divisors (see below), whose sum is σ = 2292264. Its totient is φ = 1507584.

The previous prime is 1897327. The next prime is 1897361. The reversal of 1897345 is 5437981.

It can be written as a sum of positive squares in 4 ways, for example, as 478864 + 1418481 = 692^2 + 1191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1897345 is a prime.

It is a Duffinian number.

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, 424 + ... + 1993.

It is an arithmetic number, because the mean of its divisors is an integer number (286533).

2^1897345 is an apocalyptic number.

It is an amenable number.

1897345 is a deficient number, since it is larger than the sum of its proper divisors (394919).

1897345 is a wasteful number, since it uses less digits than its factorization.

1897345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579.

The product of its digits is 30240, while the sum is 37.

The square root of 1897345 is about 1377.4414688109. The cubic root of 1897345 is about 123.7985151407.

The spelling of 1897345 in words is "one million, eight hundred ninety-seven thousand, three hundred forty-five".