1897085 has 4 divisors (see below), whose sum is σ = 2276508. Its totient is φ = 1517664.

The previous prime is 1897079. The next prime is 1897087. The reversal of 1897085 is 5807981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 344569 + 1552516 = 587^2 + 1246^2 .

It is a cyclic number.

It is not a de Polignac number, because 1897085 - 2⁴ = 1897069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897087) 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, 189704 + ... + 189713.

It is an arithmetic number, because the mean of its divisors is an integer number (569127).

2^1897085 is an apocalyptic number.

It is an amenable number.

1897085 is a deficient number, since it is larger than the sum of its proper divisors (379423).

1897085 is an equidigital number, since it uses as much as digits as its factorization.

1897085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379422.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 1897085 is about 1377.3470877016. The cubic root of 1897085 is about 123.7928600307.

The spelling of 1897085 in words is "one million, eight hundred ninety-seven thousand, eighty-five".