1421165 has 4 divisors (see below), whose sum is σ = 1705404. Its totient is φ = 1136928.

The previous prime is 1421159. The next prime is 1421191. The reversal of 1421165 is 5611241.

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 1110916 + 310249 = 1054^2 + 557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421165 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142112 + ... + 142121.

It is an arithmetic number, because the mean of its divisors is an integer number (426351).

2^1421165 is an apocalyptic number.

It is an amenable number.

1421165 is a deficient number, since it is larger than the sum of its proper divisors (284239).

1421165 is an equidigital number, since it uses as much as digits as its factorization.

1421165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284238.

The product of its digits is 240, while the sum is 20.

The square root of 1421165 is about 1192.1262517032. The cubic root of 1421165 is about 112.4298163070.

The spelling of 1421165 in words is "one million, four hundred twenty-one thousand, one hundred sixty-five".