1997465 has 4 divisors (see below), whose sum is σ = 2396964. Its totient is φ = 1597968.

The previous prime is 1997459. The next prime is 1997467. The reversal of 1997465 is 5647991.

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 802816 + 1194649 = 896^2 + 1093^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997465 - 2¹⁴ = 1981081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1997467) 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 3 ways as a sum of consecutive naturals, for example, 199742 + ... + 199751.

It is an arithmetic number, because the mean of its divisors is an integer number (599241).

2^1997465 is an apocalyptic number.

It is an amenable number.

1997465 is a deficient number, since it is larger than the sum of its proper divisors (399499).

1997465 is an equidigital number, since it uses as much as digits as its factorization.

1997465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399498.

The product of its digits is 68040, while the sum is 41.

The square root of 1997465 is about 1413.3170203461. The cubic root of 1997465 is about 125.9388508189.

The spelling of 1997465 in words is "one million, nine hundred ninety-seven thousand, four hundred sixty-five".